Ch3ch2cl Intermolecular Forces

forces also include dipole forces. It has become possible to carry out accurate calculations of intermolecular forces for molecules of useful size, and to apply the results to important practical applications such as understanding protein structure and function, and predicting the structures of molecular crystals. While oxygen's octet seems to have been filled, hydrogen only has two electrons for its valence shell. 27 Carbohydrate Research, 218 (1991) 27—54 Elsevier Science Publishers B. instead of OH– and Cl–. van der Waals Forces (or. 14D VAN DER WAALS FORCES 1. (sometimes called the London dispersion force , after the physicist Fritz London, who first described this force in the early 1900s). Make sure your spark ignitor is consistently generating a spark to create a flame and burn the propane gas. A force present in all substances with electrons is the dispersion force An intermolecular force caused by the instantaneous position of an electron in a molecule. compounds with more H-bonds (can only be Hydrogen bonded with either Flourine, Oxygen, and Nitrogen) Those have stronger intermolecular forces. All of the answer choices listed are molecular compounds except for NaOCH3 which is ionic. Schaum's Outline of Theory and Problems of Organic Chemistry George Hademenos The new edition of this study guide makes learning organic chemistry much easier than with the usual textbook, and it shows how organic chemistry is applied today in biological chemistry, medicine and industry. The important reactions all centre around the double bond. Find the mass (in g)of KMnO4 in the above solution. CH3CH2OH or CH3CH2Br I chose:CH3CH2OH 2. And in case of the remaining three compounds: (S, Se, Te) They all are in the same group of the periodic table - so they have the same type of forces/bonding. if the halogen is bonded to an sp2 hybridized carbon, it is a called a vinylic halide. Hence the intermolecular forces are very high and molecules are highly associated. (S)-1-Phenyl-1-chloroethane. Examples of intermolecular forces include the London dispersion force, dipole-dipole interaction, ion-dipole interaction, and van der Waals forces. List the following set of compounds in order of increasing boiling point. You are able to read the periodic table and determine the average atomic mass for an element like carbon. ) but only with acid. Due to this reason it is very viscous and posses high boiling point (563K). 5% alcohol as follows:. Attractive forces between molecules, or intermolecular forces, account for the melting point, boiling point, and water solubility or insolubility of organic molecules. Hydrogen bonding The hydrogen bond is the strongest intermolecular force, typically about 1/10th the strength of a covalent bond. Solvent effects are defined in a very general way as consequences of intermolecular forces, and their relevance to NMR arises from the relatively high concentrations necessary, compared with other spectroscopic methods. in chloroethane, CH3CH2Cl, we need to consider contributions for the. On the Interaction between Carbon Dioxide and Nanomaterials with High Accuracy ab initio and DFT Calculations. For many real gases this approximation holds good at low pressures and high temperatures, but it tends to break down at low temperatures and high pressures (when the separation of molecules is reduced), especially for molecules with strong intermolecular forces, such as hydrogen bonding (e. free from the influences of intermolecular forces from other substances nearby). 0 g / mol, CH 4 = 16. For which substances are the dipole dipole attractive forces greatest? Propane, dimethyl ether, are non-polar molecules that would be held together by the London forces, rather than dipole-dipole interactions. (b) Dimethyl ether’s boiling point is –23 C. Thus Krypton forms Atomic solids. Imagine the forces are like double sided tape and. dispersion forces): 1) The attractive intermolecular forces between the molecules are responsible for the formation of a liquid and a solid of a nonionic, nonpolar substance. Based on your knowledge of intermolecular forces, which of the following would you expect to have the highest boiling point? CH3CH2Cl b. CH3CH2CH2CH2CH2CH3 II. Algebra 2 Introduction, Basic Review, Factoring, Slope, Absolute Value. London forces. ChemistryPractice Unit Test 2. 2CH3CH2OH +HCO2H ⇀↽ HCO2CH2CH3. Intermolecular forces are the forces of attraction between molecules. The purpose of this review is to encompass solvent effects on the NMR spectra of various nuclei, to present the. It has an ether-like odor and bitter taste. the number of carbon atoms bonded to the double bond. CH3CCl3, CH3CH2Cl, NaCl, CCl3CH2OH b. The patterns in boiling point reflect the patterns in intermolecular attractions. Varahamihira was learned in the Vedas, but was not a blind believer in the supernatural. It has London dispersion forces and dipole-dipole forces. 5 intermolecular forces exist among the molecules. Kinetic energy of the molecules exceeds the strength of the intermolecular forces. pdf), Text File (. The only type of intermolecular force possible is Londo. Les fonctions organiques 3. 99, we provide Test bank, Solutions manual, exam bank,. Hence the order is (CH3)2CHCl< CH3CH2Cl < CH3Cl< CH3Br. 3 CH3CH2OH + PI3 --> 3CH3CH2I + H3PO3. It is one of the main types of bonding along with covalent bonding and metallic bonding. In modern times, ethanol intended for industrial use is also produced from by-products of petroleum refining. B-2AR is a membrane protein that weaves its way from the internal to the external surface of the cell membrane seven times, forming seven very close "stitches" that form a ring. Imagine the forces are like double sided tape and. The neutralisation reaction is an excellent example of how salts are formed, as it involves the transferral of electrons between acids and bases to form a salt and water. It is one of the main types of bonding along with covalent bonding and metallic bonding. Download All chapters of Organic Chemistry 11th Edition by Solomons Fryhle Snyder Test Bank Only 19. Molecular Weight 74. Draw the structures of benzoic acid, water, and methanol. Magellan radar images have disclosed the presence of a large number of almost perfectly circular domes, presumably of volcanic origin, in many regions of Venus several with diameters of 30 km or more. surface reactions, such as corrosion, and heterogeneous. 08 g mol-1) from a solid at -154. -if these stronger intermolecular forces are stronger than hydrogen bonding with water would be then the carboxylic acid won't dissolve 33 a) Explain why propanoic acid behaves as an acid but propanol does not. Intermolecular forces of attraction in liquid chloroethane are larger due to dipole-dipole attraction; thus a higher boiling point for chloroethane. Alkenes are too valuable to waste in this way. London Dispersion forces D. Therefore, the intermolecular. CH3CCl3, CH3CH2Cl, NaCl, CCl3CH2OH. (1) (d) BF3 is a covalent molecule that reacts with an F- ion to form a BF4- ion. 6 Both ethanoic acid and propylamine can form intermolecular hydrogen bonds. Hydrogen Bromide is made from KBr and 50% concentrated H2SO4 ** Phosphorus(III) Iodide is produced by reacting red phosphorus and Iodine. To boil molecular compounds the intermolecular forces of the molecules in the liquid phase have to be overcome, but to boil an ionic compound ionic bonds have to be broken. (b) Both chloroethane and acetone are polar. (b) Both chloroethane and acetone are polar. Isomerism 2. In physisorption adsorbed. Intermolecular Forces. First, it is an ion or charged molecule that interacts exclusively through neutral polar dipoles (Fig. get a idea. Despite being considered separate units, bonding forces do exist, such as dipole-dipole interactions. Difficulty Level: Medium. H3C C CH3 CH3 ~ 19 ~ OH OH CH3CH2CH2CH2 CH3CHCH2 CH3 CH3CH2CH CH3 OH OH tert-Butyl alcohol Butyl alcohol Isobutyl alcohol sec-Butyl alcohol (mp 25 °C) (mp \u201390 °C) (mp \u2013108 °C) (mp \u2013114 °C) 2. A clear conclusion to be drawn from this fact is that intermolecular attractive forces vary considerably, and that the boiling point of a compound is a measure of the strength of these forces. University. Don't be scared if you have never heard of some of these! Look at what is in the molecule, and. Molecular Weight 74. CH3CH2Cl Proton proton pada CH3 memisah isyarat untuk proton-proton CH2 Proton proton pada CH2 memisah isyarat untuk proton-proton CH3 Pemisahan isyarat berasal dari kedua keadaan spin (paralel / +1/2 dan antiparalel/ -1/2) dari proton-proton tetangganya. 0 g / mol, CH 4 = 16. CH3CH2Cl (6) C2H2. The dipolar groups include main chain NH and CO groups as well as the polar groups of Ser, Thr, Asn, Gln, Tyr, and Trp side chains. CH3Br What forces are present? CH3CH2CH2OH. Hydrogen bonding is just a special case of. At low temperature London dispersion forces become stronger in them and solidify the gaseous Krypton. on the nature of the forces. REPRESENTATIVE CARBON COMPOUNDS: FUNCTIONAL GROUPS, INTERMOLECULAR FORCES, AND INFRARED (IR) SPECTROSCOPY Structure Is Everything 1. pentanoic acid d. Which substance would be able to form hydrogen bonds to water but would not have any hydrogen bonding between their own molecules? ethanol c. 6 118 Sodium acetate CH3CO2Na 324 dec 43 13B. School: Washington Academy and High School. Allow abbreviated formulas C2H3Cl, C2H5Cl, C2H5OH. (b) SO 2 Analyze the type of bonding and the type of intermolecular force in SO 2 SO 2 is a polar covalent compound. 6) Place the following compounds in increasing order of intermolecular forces. It has become possible to carry out accurate calculations of intermolecular forces for molecules of useful size, and to apply the results to important practical applications such as understanding protein structure and function, and predicting the structures of molecular crystals. (CH3)3CCH3 III. The varied effects of these molecules is due to differences in their functional groups and how they bind. Haloalkanes have been known for centuries. weaker *van der Waals’ forces. 14 - What type of intermolecular forces is active in Ch. (b) Both chloroethane and acetone are polar. instead of OH- and Cl-. How much energy is required to heat 87. The substances are arranged in order of increasing molar mass: H 2 = 2. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. Answer of 1st question : The dipole moment in assending order will be CCl4 < CHCl3 < CH2Cl2 P. The patterns in boiling point reflect the patterns in intermolecular attractions. The file contains 75 page(s) and is free to view, download or print. Faktor-Faktor Yang Mempengaruhi Pergeseran Kimia Dan Tetapan Penggabungan 1. It is a colorless, flammable gas or refrigerated liquid with a faintly sweet odor. Greater surface area leads to a more intermolecular attraction which in results in a higher boiling point. Predicting the Shapes of Molecules. CH3CH2Cl or CH3CH2OH I chose: CH3CH2Cl 2. Name the solid which has weakest intermolecular force ? Ans. The intermolecular forces present in HSCH 2 CH 2 SH include which of the following? I. CH3-CH2-CH2-CH2-O-C6H5 a. Thus paraffin, which consists of hydrocarbons of high molecular weight (usually, >20 carbon atoms per molecule), has the highest boiling point. The file contains 75 page(s) and is free to view, download or print. List the following set of compounds in order of increasing boiling point. What occurs at this stage of the cycle? Label A-F based on the table using C for concentrated and D for dilute. There are three intermolecular forces of ethanol. • With increasing chain length, melting and boiling points increase with increasing chain lengths due to increasing strength of intermolecular forces (Van de Waal: London forces, dipole- dipole and hydrogen bonding) • Volatility (ability to evaporate) and flammability (ability to catch fire) decreases down a group. Intermolecular forces - van der Waals forces RMM of CH4 is 16, that for N2 is 28. 1 g acetone (molar mass = 58. -dispersion, dipole dipole, and hydrogen bonding. Intermolecular Forces. CH3CH2CH3, CH3CH2COOH, CH3CH2CH2NH2, CH3CH2OCH3. The types of intermolecular forces present in ammonia, or NH3, are hydrogen bonds. Matriculation Chemistry ( Hydrocarbon ) part 2 alkane - Free download as Powerpoint Presentation (. now we look for the longer molecule. Phillis Chang. 4) All are correct. Arrange the following types of interactions in correct order of their increasing strength : Covalent, hydrogen bonding, Vander Waals, dipole dipole Ans. txt) or read online for free. 3) Vulcanization rubber is an example of elastomers. Rank the following compounds in order of decreasing vapor pressure based on intermolecular forces: a) CH4 b) isopentane C5H12 (2-methyl butane) c) CH3CH2CH2CH2OH d) CH3CH2CH2CH2CH3 you can overlap the choices if they are of the same vapor pressure -if intermolecular force increases, vapor pressure increases -intermolecular forces such as london. At low temperature London dispersion forces become stronger in them and solidify the gaseous Krypton. Faktor-Faktor Yang Mempengaruhi Pergeseran Kimia Dan Tetapan Penggabungan 1. USE: Ethyl bromide is used to make other chemicals and as a solvent. CH3Cl3, CH3Br, CH3CH2Cl, (CH3)2CHCl. : (1) CH3CH2Cl and CH3CH2Br (2) CH3CHCH2 and CH3CH2CH3 (3) CH3CHO and CH3COCH3 (4) CH3CH2OH and CH3OCH3 (4) CH3CH2OH and CH3OCH3 b/c both have the same molecular formula-- 2 carbon atoms, 6 hydrogen atoms, 1 oxygen atom-- and each compound have different functions. txt) or view presentation slides online. (D) the smaller the deviation from ideal gas behavior. • With increasing chain length, melting and boiling points increase with increasing chain lengths due to increasing strength of intermolecular forces (Van de Waal: London forces, dipole- dipole and hydrogen bonding) • Volatility (ability to evaporate) and flammability (ability to catch fire) decreases down a group. Answer to 3. Final answer: CH3COF. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. A) CH4 B)CH3CH3 C) CH3CH2Cl D) CH3CH2OH **I know High Intermolecular force = High boiling point!** My question is if A, B & C are dipole-dipole, and D is hydrogen asked by Tc on July 2, 2011. Intermolecular forces determine a compound's boiling point. Organic Chemistry (Schaum's Outlines) 4th ed. How size of the intermolecular force affects energy needed The forces between bromine I Bra molecules are (than the forces between chlorine I C12 molecules leading to more energy needed to separate the molecules) (or converse) OR brom ne I Br2 has intermolecular forces (or converse) Initiation M2 First propagation Cl. ; Pettengill, G. Cs+ and CH3CH2Cl. Write equations to show the mechanisms of the following reactions. CH3CH2OH + PCl5 --> CH3CH2Cl + POCl3 + HCl. (sometimes called the London dispersion force , after the physicist Fritz London, who first described this force in the early 1900s). (CH3)3CCH2CH3 CH3CH2OH CH2Br2 CH3CH2CH3 CH3CH2Cl HOCH2CH2OH. • With increasing chain length, melting and boiling points increase with increasing chain lengths due to increasing strength of intermolecular forces (Van de Waal: London forces, dipole- dipole and hydrogen bonding) • Volatility (ability to evaporate) and flammability (ability to catch fire) decreases down a group. on StudyBlue. 2) The average distribution of charge in a nonpolar molecule over a period of time is uniform. CH3CH2OH or CH3CH2Br I chose:CH3CH2OH 2. Bibliographic content of Journal of Computational Chemistry, Volume 25. Place the following compounds in order of increasing strength of intermolecular forces. Alcohol molecules can hydrogen bond to each other and these strong intermolecular forces give them higher boiling points still. Hydrogen bonding is a type of intermolecular force that gets formed when a compound has hydrogen atom directly attached to highly electro-negative N, F or O atom. Higher energy is required to break down the intermolecular forces among the molecules of 1-bromobutane. What occurs at this stage of the cycle? Label A-F based on the table using C for concentrated and D for dilute. Making statements based on opinion; back them up with references or personal experience. For example, at 25 oC water has a vapor pressure of 24 torr, whereas acetone (C3H6O) and diethyl ether (C4H10O) have vapor pressures of about 230 torr and 530 torr, respectively. The boiling point increases as the molar mass of the substance increases. Get an answer for 'CH3CH2CH3, CH3CH2CH2OH, CH3CH2OCH3 List them in order from highest to lowest in terms of boiling points and highest to lowest terms of their solubility in a polar solvent. The boiling point of H2O, compared with the other members of the series, can be explained by a) London dispersion forces. 5 intermolecular forces exist among the molecules. How much energy is required to heat 87. When we treat Ethyl chloride is treated with Na metal in the presence of dry ether gives butane and sodium chloride as a product. intra- and intermolecular kinetic isotope effects. Arrange the compounds in order of increasing boiling point. the bigger and longer a molecule is, the more polarizable it is, and therefore the strongeeer the intermolecular forces are. Mori-Sánchez, Paula; Cohen, Aron J. 95 New Way Chemistry for Hong Kong A-Level 3A 95 New Way Chemistry for Hong Kong A-Level Book 3A. NASA Astrophysics Data System (ADS) Vogiatzis, Konstantinos D. Sales Force Union. This video gives an introduction to Intermolecular Forces (or IMFs) in liquids. As a Lewis base , it can react with Lewis acids to form salts and reacts violently with oxidizing agents. Thus, in order to break the intermolecular attractions that hold the molecules of a compound in the condensed liquid state, it is necessary to increase. Rank the following sets of compounds in order of decreasing acidity. Intermolecular forces of attraction in liquid chloroethane are larger due to dipole-dipole attraction; thus a higher boiling point for chloroethane. Rank the following compounds in order of decreasing … Rank the following compounds in order of decreasing … data a by type of intermolecular force. ppt), PDF File (. Use dashed lines to show the IMF. REPRESENTATIVE CARBON COMPOUNDS: FUNCTIONAL GROUPS, INTERMOLECULAR FORCES, AND INFRARED (IR) SPECTROSCOPY Structure Is Everything 1. dipole forces: O C O: Topic: Intermolecular Forces 86 Briefly explain why No hydrogen bonding is possible between molecules of propane, resulting in a lower boiling point compared with ethanol Ethanol, C2H5OH, and dimethyl ether, CH3OCH3, have the same molar mass, yet, ethanol has a much higher boiling point. The positive region of one molecule is attracted to the negative region of another and repulsed by the positive region of another molecule. Gallium (Ga) is a silvery white metal, liquid at room temp. Hydrogen Bonds are a special type of dipole forces, in which a hydrogen atom is covalently bound to a very electronegative atom (N, O, F), resulting in a large dipole. It has become possible to carry out accurate calculations of intermolecular forces for molecules of useful size, and to apply the results to important practical applications such as understanding protein structure and function, and predicting the structures of molecular crystals. (S)-1-Phenyl-1-chloroethane. Publishing platform for digital magazines, interactive publications and online catalogs. He was a scientist. dispersion, hydrogen bonding, and dipole-dipole CH3CH2OH CH2Br2 CH3CH2CH3 CH3CH2Cl HOCH2CH2OH. Which molecule would you expect to have no dipole moment (i. Like any other hydrocarbons, alkenes burn in air or oxygen, but these reactions are unimportant. Which has the lowest boiling point? 1. These forces are weaker bonds than Hydrogen bonds but stronger than London Dispersion forces. The more compact the shape, the weaker the intermolecular forces of attraction and the lower the boiling point. 200 g of the gas took up a volume. Li+ and ClO2- both are ions so interactions are ion-ion interactions. It can also not have Dipole-Dipole as a force due to the fact that the molecule is not Polar. 5 - Non-Polar 0. A hydrogen bond is the attraction of hydrogen in one molecule to the oxygen, nitrogen, or fluorine in another molecule. surface reactions, such as corrosion, and heterogeneous. ChemistryPractice Unit Test 2. 6 Both ethanoic acid and propylamine can form intermolecular hydrogen bonds. this question asked for us. Induced dipole (dispersion) forces also exist between their molecules, but these are much weaker than the hydrogen bonds. Hence the order is (CH3)2CHCl< CH3CH2Cl < CH3Cl< CH3Br. In modern times, ethanol intended for industrial use is also produced from by-products of petroleum refining. Thus Krypton forms Atomic solids. McGraw-Hill New York Chicago San Francisco Lisbon London Madrid Mexico City Milan New Delhi San Juan Seoul Singapore Sydney Toronto Patnaik_FM_049439-8 11/11/02 3:11 PM Page ii Library of Congress Cataloging-in-Publication Data Patnaik, Pradyot. pdf код для вставки. Notas de estudo Biologia e Química Notas de estudo Química. Thio organized these in order of increasing boiling point. and therefore the boiling point of each series of compounds. Decane has the longest carbon chain, the strongest London forces between its molecules, and the highest boiling point. It is a colorless, flammable gas or refrigerated liquid with a faintly sweet odor ChemicalBook. In which substance would London dispersion forces be the only intermolecular force of attraction? 1-pentanol c. Source(s): chemistry course. Les hydrocarbures 2. Practice Unit Test 2Time allowed: 1 hour 15 minutes Use the periodic table printed at the back of the textbook (page 340). Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. molecules are held by the. 5 A Summary of van der Waals Intermolecular Forces. Siguion Reyna, Montecillo & Ongsiako for private. Consider two different organic compounds, each with the formula C 2 H 6 O. free from the influences of intermolecular forces from other substances nearby). This happens when electrons are not distributed evenly around the nucleus. The first organic chemical to be synthesized in a lab from inorganic chemicals was. NASA Technical Reports Server (NTRS) Ford, P. Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. (S)-1-Phenyl-1-chloroethane. Intermolecular Forces (van der Waals Forces) The forces that act between molecules are not as strong as those between ions ; These intermolecular forces, van der Waals. The positive region of one molecule is attracted to the negative region of another and repulsed by the positive region of another molecule. London Dispersion forces D. Problem: Identify the intermolecular forces present in the following solids:(c) CH3CH2Cl 🤓 Based on our data, we think this question is relevant for Professor Fleming's class at CSUEASTBAY. At low temperature London dispersion forces become stronger in them and solidify the gaseous Krypton. pdf код для вставки. Since these intermolecular forces are weak, the molecules are readily separated. Boiling Points of Methane, Ethane, Propane Larger molecule = stronger dispersion forces = molecules are more attracted to each other = tougher to separate = higher boiling point. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. Answer: CH3CH2CH2CH3 has greater van der Waals forces because it has a greater contact area than isobutane. Which one of the following statements does not describe the general properties of liquids accurately? a. 2014-12-21. Salts are formed through ionic bonding, which can only occur between a cation and an anion. dipole-dipole II. 95 New Way Chemistry for Hong Kong A-Level 3A 95 New Way Chemistry for Hong Kong A-Level Book 3A. is the most polar, allowing for high intermolecular force levels. They occur when the slightly positive end of one polar molecule is attracted to the slightly negative end of another polar molecule. and therefore the boiling point of each series of compounds. 1331 - CHAPTER 11 QUESTIONS IGNORE QUESTIONS 3, 10, 37 onwards Intermolecular Forces 1. The intoxicating effects of ethanol consumption have been known since ancient times. Attractive forces between molecules, or intermolecular forces, account for the melting point, boiling point, and water solubility or insolubility of organic molecules. The term intermolecular force refers to the attractive or repulsive force between a molecule and a nearby molecule, atom, or ion. Determine the kinds of intermolecular forces that are present in each element or compound. (sometimes called the London dispersion force , after the physicist Fritz London, who first described this force in the early 1900s). Analysis of the Acting Forces in a Theory of Catalysis and Mechanochemistry. Now let's see the d. Lets take NaCl for example. isopropyl alcohol c. of butanol is higher than that of butanal because butanol has strong intermolecular H-bonding while butanal has weak dipole-dipole interaction 18. Explain why based on intermolecular forces. Frank Jenkins Lucille Davies Donald Plumb Maurice Di Giusepp Hans van Kessel | download | B–OK. Study 73 Exam 3 flashcards from Kaitlyn W. Which of these is the weakest of the intermolecular attractive forces? A) Ion-ion B) Dispersion forces C) Dipole-dipole D) Covalent bonding E) Hydrogen bonding Ans: B Topic: Intermolecular forces. (ii) What can be inferred about the relative strengths of the intermolecular forces in CCl 4 (l) and HCl( ? l) Justify your answer in terms of the information above. The distance between molecules in a crystal lattice is small and regular, with intermolecular forces serving to constrain the motion of the molecules more severely than in the liquid state. Families of Carbon Compounds Functional Groups, Intermolecular Forces, & Infrared (IR) Spectroscopy Created by Professor William Tam & Dr. Since these intermolecular forces are weak, the molecules are readily separated. The bond dissociation energy for F3Si-F is 166 kcal/mol, while the bond dissociation energy for H 3 Si-F is 152 kcal/mol. (a) State two characteristics of a homologous series. Organic Chemistry, 8th Edition CH3CH2Cl Chloroethane or ethyl chloride Intermolecular Forces 143 Preparation of Alkyl Halides from Alcohols and Hydrogen. pdf), Text File (. Note: If you aren't happy about intermolecular forces (particularly van der Waals dispersion forces and dipole-dipole interactions) then you really ought to follow this link before you go on. The electron donating groups will be increased the basicity of the amines while the electron withdrawing groups will be decreased the basicity of amines. Problem: Identify the intermolecular forces present in the following solids:(c) CH3CH2Cl 🤓 Based on our data, we think this question is relevant for Professor Fleming's class at CSUEASTBAY. CH3CH2OH CH3CH2I CH3CH2Cl The starting molecule for the krebs cycle is A part of the calvin cycle has been removed from the diagram on the right. The molecules of 2-iodo-2-methylpropane are more polar and have stronger IMF than the molecules of. Due to this reason it is very viscous and posses high boiling point (563K). Forces and Liquid Structure Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding) *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids) Molecular Shape and Structure. CH3CH2Cl d. Covalent bond strength: 50-200 kJ/mole Intermolecular force: 1-12 kJ/mole. How size of the intermolecular force affects energy needed The forces between bromine I Bra molecules are (than the forces between chlorine I C12 molecules leading to more energy needed to separate the molecules) (or converse) OR brom ne I Br2 has intermolecular forces (or converse) Initiation M2 First propagation Cl. This force of attraction is stronger than the electrostatic attraction between the ions in the ionic compound and the dipole-dipole interaction (or hydrogen bonding as in water) between the solvent molecules. Never bring the propane tank into the. Attractive forces between molecules, or intermolecular forces, account for the melting point, boiling point, and water solubility or insolubility of organic molecules. Th reason the Si-F bond is believed to be so strong is because there is a significant electronegativity difference between the two atoms. 14D van der Waals Forces. CH3OH, CH3SH, CH3F, CH3 Thank you. Please Help: List the following set of compounds in order of increasing boiling point. Organic Chem. instead of OH– and Cl–. CH3CH2Cl- although Cl is incapable of forming hydrogen bonds, there is still some polarity of the C-Cl bond that allows for some intermolecular forces between molecules. The more polar the molecule (and the larger) the stronger the intermolecular attractions. The force is now called gravity. In this view molecules can be considered discrete in how they act at the molecular level. The remaining compounds are polar, but Ch3CH2CH2OH shows greater solubility in water owing to presence of hydrogen bonding. So there is no chance to ion-dipole interactions. Robinson Louisiana State University Baton Rouge, Louisiana, U. is the most polar, allowing for high intermolecular force levels. Therefore this compound will not be soluble in water. (a) CH 2 Cl 2 or CH 2 Br 2. Which has the lowest boiling point? 1. It is a colorless, flammable gas or refrigerated liquid with a faintly sweet odor. Algebra 2 Introduction, Basic Review, Factoring, Slope, Absolute Value. Nature of the adsorbent Adsorption is a surface phenomenon. phenylbutyl ether d. molecules will have enough energy to overcome the intermolecular forces and enter into the gas phase. CH3CH2Cl. As well as hydrogen bonding, intermolecular forces include van der Waals dispersion forces and dipole-dipole interactions. • Branches in the chain tend to decrease the melting and boiling points(WHY?). To better understand the nature of the corresponding intermolecular interactions, we. There are two main intermolecular forces to consider here: dipole-dipole interactions and hydrogen-bonding (which is basically very strong dipole-dipole). Marked set by BGOOD. Chapter Questions c. London forces. All other factors being unchanged, the greater the molar mass of a molecule the stronger the intermolecular forces, hence the trend in the boiling points of the alkanes illustrated below. Don't be scared if you have never heard of some of these! Look at what is in the molecule, and. the bigger and longer a molecule is, the more polarizable it is, and therefore the strongeeer the intermolecular forces are. Selected Answer: True Answers: True False Question 8 1. These stronger forces occur because CBr4 is larger and/or has more electrons than CCl4. Sulfur is also more polarizable than oxygen. Intermolecular forces determine a compound's boiling point. Since all three of your choices are homonuclear diatomics (two atoms the same in a molecule), there is no polarity in the molecule so no dipole-dipole forces and no hydrogens so no H-bonding. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. Wolfgang Quapp* Josep Maria Bofill* Jordi Ribas-Ariño*. The explanation of these closely related phenomena depends on intermolecular forces and the kinetic behavior of the particles, which is qualitatively similar to those used in deriving the kinetic theory of gases. USE: Ethyl bromide is used to make other chemicals and as a solvent. Glycerol is very viscous with extensive intermolecular hydrogen bonding. Unformatted text preview: Organic Chemistry Ms. 2014-12-21. Electromagnetivity is the ability of an atom to attract electrons when atoms are in a compound. CH3COF is polar, exhibits Keesom forces (dipole-dipole attraction), but not hydrogen bonding. Molecular Weight 74. • Organic compounds are generally held together by weak intermolecular forces(Van Der Waals forces) 5. It has an ether-like odor and bitter taste. You could alternatively also draw the structure by including two dots for every bond. A) CH4 B)CH3CH3 C) CH3CH2Cl D) CH3CH2OH **I know High Intermolecular force = High boiling point!** My question is if A, B & C are dipole-dipole, and D is hydrogen bonding. Answer: The answer is: CH₄ < CH₃OH < CH₃CH₂OH < HOCH₂CH₂OH. But why? Because the decrease of melting temperature and increase of boiling temperature simply depend on the AMOUNT (quantity) of impurities, not on the quality. NASA Technical Reports Server (NTRS) Ford, P. Ethanol and formic acid exist in equilibrium with ethyl formate. CH3CH2Cl d. 10 mol dm-3 KOH(aq) to form 2-methylpropan-2-ol is an example of nucleophilic substitution. if you have a liquid containing all of these substances and are distilling it, the lowest bp substances distill first. Aldehydes, ketones, halogenoalkanes. The molecular masses of four substances are as follows: A = 16, B = 58, C = 86, D = 116. forces and occurs in each homologous series. This means that the intermolecular forces are the strongest in butan-1-ol and it has the. An ion-dipole force is a type of intermolecular force in which forces of attraction or repulsion occur between neighboring ions, molecules or atoms. They occur when the slightly positive end of one polar molecule is attracted to the slightly negative end of another polar molecule. a) Strongest of the 3 intermolecular forces but covalent network and ionic bonds are still much stronger. CH3CH2Cl a) induced dipole-induced dipole (London or dispersion) b) dipole-dipole c) hydrogen bonding asked by @nicolep148 • 9 months ago • Chemistry → Intermolecular Forces. Chloroethane, commonly known by its old name ethyl chloride, is a chemical compound with chemical formula CH 3 CH 2 Cl, once widely used in producing tetraethyllead, a gasoline additive. Hence the order is (CH3)2CHCl< CH3CH2Cl < CH3Cl< CH3Br. Ethanol and formic acid exist in equilibrium with ethyl formate. Which one of the following statements does not describe the general properties of liquids accurately? a. Answer to: For the hypothetical reaction A+3B = 2C, the rate of appearance of C given by (delta [C]/delta t) may be also be expressed as A). 08 g mol-1) from a solid at -154. Here HOCH2CH2OH>CH3CH2OH>CH3CH2Cl [order of intermolecular forces]Due to two hydroxyl groups there is strong hydrogen bonding compared to one hydroxyl group and one chloride group. 3) A sponge has minute holes,in which air is trapped, when we press it,the air is expelled out and we are able to compress it. Unit 1 Physical and chemical properties of cis-/trans-geometrical isomers of butenedioic acid. (sometimes called the London dispersion force , after the physicist Fritz London, who first described this force in the early 1900s). 1 g / mol , and also in order of increasing heat of vaporization. • Melting points of the hydrogen halides increase in the order HCl < HBr < HF < HI. For many real gases this approximation holds good at low pressures and high temperatures, but it tends to break down at low temperatures and high pressures (when the separation of molecules is reduced), especially for molecules with strong intermolecular forces, such as hydrogen bonding (e. UNDERGRADUATE INSTRUMENTAL ANALYSIS Sixth Edition UNDERGRADUATE INSTRUMENTAL ANALYSIS Sixth Edition James W. Thirty six asked us to determine the kind of in a molecular forces that are present in each element or compound. In physisorption adsorbed. 2009 DOI 10. Absolute alcohol: Absolute alcohol is 100% ethanol prepared from rectified spirit 95. The bond dissociation energy for F3Si-F is 166 kcal/mol, while the bond dissociation energy for H 3 Si-F is 152 kcal/mol. The hydrolysis of 2-iodo-2-methylpropane by 0. This happens because the strength of the intermolecular forces between the molecules is affected by the orientation of the polar (dipole) bonds. 1 g acetone (molar mass = 58. (b) Both chloroethane and acetone are polar. And in case of the remaining three compounds: (S, Se, Te) They all are in the same group of the periodic table - so they have the same type of forces/bonding. organic water could be greater because of the fact the density of ice is under that of water. Difficulty Level: Medium. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. 5 intermolecular forces exist among the molecules. txt) or read online for free. (Are each of the following dipole-dipole, London dispersion, or hydrogen bonding?) 1) Ethane (CH3CH3) 2) Ethyl Alcohol (CH3CH2OH) 3) Ethyl chloride (CH3CH2Cl). a) Strongest of the 3 intermolecular forces but covalent network and ionic bonds are still much stronger. Allow abbreviated formulas C2H3Cl, C2H5Cl, C2H5OH. Heat will cause the gas pressure to increase, which may open the relief valve and allow gas to escape. Using quantum mechanics, the behavior of an electron in a molecule is still described by a wave function, Ψ , analogous to the behavior in an atom. Faktor-Faktor Yang Mempengaruhi Pergeseran Kimia Dan Tetapan Penggabungan 1. aldehyde c. Ali Sheikh. (S)-1-Phenyl-1-chloroethane. Arrange the compounds in order of increasing boiling point. Draw the structures of benzoic acid, water, and methanol. phenylbutyl ether d. Answer: CH3CH2CH2CH2CH3 has the higher boiling point. Liquids, Solids, and Intermolecular Forces; Chemistry Structure and Properties Nivaldo Tro. B) NH 2 CH 3 < F 2 < CO 2. Hydrogen Bonds: H atom must be attached directly to a N, O, or F. A cubic solid is made of two elements. txt) or read online for free. Grades Appropriate: 10-12. They are the average value of the bond enthalpy for the same bond in different molecules. REPRESENTATIVE CARBON COMPOUNDS: FUNCTIONAL GROUPS, INTERMOLECULAR FORCES, AND INFRARED (IR) SPECTROSCOPY Structure Is Everything 1. H-bonding tends to be the strongest force, if present. Liquids, Solids, and Intermolecular Forces, Chemistry Structure and Properties - Nivaldo Tro | All the textbook answers and step-by-step explanations c. ; Pettengill, G. OPLE, as Minister of Labor and SAN MIGUEL CORPORATION, respondents. (f) Identify the strongest type of intermolecular force present in each of the compounds propan-1-ol, propanal and propanoic acid. Place the following compounds in order of increasing strength of intermolecular forces. Discrete molecules retain molecular identity, and such molecules would act like distinct units of matter. The nature of the functional group plays a large effect in the type of. Matriculation Chemistry ( Hydrocarbon ) part 2 alkane - Free download as Powerpoint Presentation (. The distance between molecules in a crystal lattice is small and regular, with intermolecular forces serving to constrain the motion of the molecules more severely than in the liquid state. Faktor-Faktor Yang Mempengaruhi Pergeseran Kimia Dan Tetapan Penggabungan 1. The more polar the molecule (and the larger) the stronger the intermolecular attractions. (c) CBr4 boils at a higher temperature than CCl4 because it has stronger intermolecular forces (or van der Waal or dispersion). The lowering of vapor pressure. The net force on any one particle will be along the x-direction (because components in the y-direction are equal and opposite and will cancel each other), and it is given as: F=F2+2F1 cos45°⇒F=GM22R2+2GM2R22 cos45° =GM24R2+2GM222R2 =GM2R214+12Because the particles are moving in a circle, this force will provide the necessary centripetal force. Explain, in complete sentences, how you determined the order for each set. Which has the smallest dipole-dipole forces? a) Cl2 b) CH3CH2Cl c) H2Se d) PH3. Section: 2. CH3CH2OH or CH3CH2Br I chose:CH3CH2OH 2. Ethane thiol is thus more involatile than chloroethane because of this intermolecular interaction. Which has the lowest boiling point? 1. Crystalline Solids Atoms and molecules are composed in 3D. 4 Intermolecular Forces Involving Nonpolar Molecules; 12. The neutralisation reaction is an excellent example of how salts are formed, as it involves the transferral of electrons between acids and bases to form a salt and water. ChemistryPractice Unit Test 2. Chloroethane was produced synthetically in the 15th century. It can also not have Dipole-Dipole as a force due to the fact that the molecule is not Polar. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. CH3CH2OH + HBr -> CH3CH2Br + H2O. The lowering of freezing point. Intermolecular forces hold molecules together. For which substances are the dipole dipole attractive forces greatest? Propane, dimethyl ether, are non-polar molecules that would be held together by the London forces, rather than dipole-dipole interactions. Numerade Educator 01:32. First, it is an ion or charged molecule that interacts exclusively through neutral polar dipoles (Fig. Total chemical synthesis and X-ray structure of kaliotoxin by racemic protein crystallography. Pentelute, Brad L; Mandal, Kalyaneswar; Gates, Zachary P; Sawaya, Michael R;. dipole forces: O C O: Topic: Intermolecular Forces 86 Briefly explain why No hydrogen bonding is possible between molecules of propane, resulting in a lower boiling point compared with ethanol Ethanol, C2H5OH, and dimethyl ether, CH3OCH3, have the same molar mass, yet, ethanol has a much higher boiling point. phenylbutyl ether d. 4 Intermolecular forces 4. They are London dispersion, dipole-dipole and the hydrogen bond. The water molecules have strong intermolecular forces of hydrogen bonding. Topic: Intermolecular forces Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D This alkane is predicted to have the highest melting point of those shown: A) CH3CH2CH2CH3 B) C) CH3CH2CH2CH2CH3 D) E) Ans: E. Kinetic energy of the molecules equals the strength of the intermolecular forces. 2 (ii) H2SO4/H+/acidified and Cr2O72-/(potassium/sodium) dichromate; Accept suitable oxidizing agents (e. Decide the shape adopted by the electron pairs 4. Intermolecular Forces in Chemistry: Definition, Types & Examples Charles' Law: Gas Volume and Temperature Relationship. Explain this statement using phenylazobenzene as the example. The force is now called gravity. 1 Ethyl alcohol CH3CH2OH -115 78. 3) Vulcanization rubber is an example of elastomers. The stronger the. A structural isomer of hexane is ____. Full file at https://fratstock. 2-methylpropane. this question asked for us. A) F 2 < NH 2 CH 3 < CO 2. CH3CH2CH3, CH3CH2COOH, CH3CH2CH2NH2, CH3CH2OCH3 c. Dispersion Forces: These two molecules are adjacent in a liquid, so they are attracted by dispersion forces. Typically, the pi bond breaks and the electrons from it are used to join the two carbon atoms to other things. on the nature of the forces. the number of carbon atoms bonded to the double bond. 6) Place the following compounds in increasing order of intermolecular forces. Ali Sheikh. Boiling Points of Methane, Ethane, Propane Larger molecule = stronger dispersion forces = molecules are more attracted to each other = tougher to separate = higher boiling point. this question asked for us. It's just that the attraction of electrons, to protons in a neighboring molecule, are much weaker than their attraction to protons in the same molecule; that's. dipole-dipole forces B. What is the intermolecular force present in br2? Ion−Ion forces are much stronger than any intermolecular forces. Chapter 8 Inter molecular forces. de grundvorlesung organische chemie i-tutorium übungsblatt a1 welches atom besitzt im. CH3CH2Cl, F2, NH2CH3 A) NH2CH3 PLEASE CHECK!!. Ultimately it's all electrostatics: electrons and protons are attracted to each other. Despite being considered separate units, bonding forces do exist, such as dipole-dipole interactions. All other factors being unchanged, the greater the molar mass of a molecule the stronger the intermolecular forces, hence the trend in the boiling points of the alkanes illustrated below. These will only be dispersion forces and dipole-dipole interactions. name number_____ 09-105 fall 2016 problem set (20 points) [lecture notes through due monday 10/31 in lecture recitation (circle below one ta and one time):. Download All chapters of Organic Chemistry 11th Edition by Solomons Fryhle Snyder Test Bank Only 19. The stronger the. Anything with higher electronegativity has stronger forces. • With increasing chain length, melting and boiling points increase with increasing chain lengths due to increasing strength of intermolecular forces (Van de Waal: London forces, dipole- dipole and hydrogen bonding) • Volatility (ability to evaporate) and flammability (ability to catch fire) decreases down a group. CH3CH2OH + PCl5 --> CH3CH2Cl + POCl3 + HCl. Which has the strongest intermolecular forces of attraction? 1. ) One point is earned for a correct answer. (C) the higher the vapor pressure. (4) (Total 20 marks) 55. Of the following compounds, the one with the highest boiling point is: A) CH3CH3 B) CH3CH2Cl C) D) CH3CH2OH E) CH3CH2OCH2CH3 Ans: D Topic: Intermolecular forces. Don't be scared if you have never heard of some of these! Look at what is in the molecule, and. It is a colorless, flammable gas or refrigerated liquid with a faintly sweet odor. 2 mol/L NaCl will have a higher increase in boiling temperature than glucose. Use dashed lines to show the IMF. Corrections to the Potential of Mean Force. Arrange the following in order of increasing boiling point: CH4, CH3CH3, CH3CH2Cl, CH3CH2OH. CH3CH2CH3, CH3CH2COOH, CH3CH2CH2NH2, CH3CH2OCH3 c. Because of the resulting stronger ion-dipole interaction. ethylene glycol d. The term intermolecular force refers to the attractive or repulsive force between a molecule and a nearby molecule, atom, or ion. Intermolecular forces of attraction in liquid chloroethane are larger due to dipole-dipole attraction; thus a higher boiling point for chloroethane. ppt), PDF File (. CH3COF is polar, exhibits Keesom forces (dipole-dipole attraction), but not hydrogen bonding. (b) Dimethyl ether’s boiling point is –23 C. Since the intermolecular forces present in molecules of propan-1-ol are stronger than those present in molecules of propanal, a larger amount of energy is required to separate the propan-1-ol molecules in the process of boiling. The distance between molecules in a crystal lattice is small and regular, with intermolecular forces serving to constrain the motion of the molecules more severely than in the liquid state. 7 Chloroethane CH3CH2Cl -138. CH3Cl3, CH3Br, CH3CH2Cl, (CH3)2CHCl. To determine the electromagnetivity of an atom: < 0. Grades Appropriate: 10-12. NASA Technical Reports Server (NTRS) Ford, P. van der Waals Forces (or London forces or dispersion forces): 1) The attractive intermolecular forces. CH3CH2Cl Proton proton pada CH3 memisah isyarat untuk proton-proton CH2 Proton proton pada CH2 memisah isyarat untuk proton-proton CH3 Pemisahan isyarat berasal dari kedua keadaan spin (paralel / +1/2 dan antiparalel/ -1/2) dari proton-proton tetangganya. name number_____ 09-105 fall 2016 problem set (20 points) [lecture notes through due monday 10/31 in lecture recitation (circle below one ta and one time):. direct dynamics studies on the reaction of H atom with CH3CH2Cl. The remaining compounds are polar, but Ch3CH2CH2OH shows greater solubility in water owing to presence of hydrogen bonding. NW + 1 more educators. Which molecule would you expect to have no dipole moment (i. 49) Primary and secondary amines exhibit hydrogen bonding; tertiary amines do not. 5 Acetaldehyde CH3CHO -121 20 Acetic acid CH3CO2H 16. Arrange the following in order of increasing boiling point: CH4, CH3CH3, CH3CH2Cl, CH3CH2OH. if you have a liquid containing all of these substances and are distilling it, the lowest bp substances distill first. Molecular Modelling and Bonding answers these questions by introducing the ideas behind molecular and quantum mechanics, using a largely non-mathematical approach. name number_____ 09-105 fall 2016 problem set (20 points) [lecture notes through due monday 10/31 in lecture recitation (circle below one ta and one time):. ) but only with acid. Which one of the following statements does not describe the general properties of liquids accurately? a. Arrange the following substances in order of increasing boiling point CH3OH, CH4, CH3CH2OH, HOCH2CH2OH Multiple Choice O CH3OH - 13143026. How much energy is required to heat 87. 3 Interactions between Molecules with a Dipole; 12. How size of the intermolecular force affects energy needed The forces between bromine I Bra molecules are (than the forces between chlorine I C12 molecules leading to more energy needed to separate the molecules) (or converse) OR brom ne I Br2 has intermolecular forces (or converse) Initiation M2 First propagation Cl. As Chemistry Unit 2 Notes - Free download as Word Doc (. dienstag, 29. A structural isomer of hexane is ____. The boiling point of H2O, compared with the other members of the series, can be explained by a) London dispersion forces. now we look for the longer molecule. cyclohexylbutyl ether b. Which has the strongest intermolecular forces of attraction? 1. Intermolecular forces of attraction in liquid chloroethane are larger due to dipole-dipole attraction; thus a higher boiling point for chloroethane. install custom powershell module, Mar 29, 2018 · PowerShell module to ingest data into the Log Analytics Ingestion API. Answer: CH3CH2CH2CH2CH3 has the higher boiling point. Imagine the forces are like double sided tape and. Chapter 8 Inter molecular forces. All Chemistry Practice Problems Intermolecular Forces and Physical Properties Practice Problems Q. In a blatant plug for the Reagent Guide, each Friday I profile a different reagent that is commonly encountered in Org 1/ Org 2. ethylene glycol d. All the bonds are single covalent bonds. They occur when the slightly positive end of one polar molecule is attracted to the slightly negative end of another polar molecule. CH3OCH3 has the lowest boiling point because the intermolecular forces are primarily due to weak van der Waals bonds with no hydrogen bonding component as in the other molecules. The three-dimensional structure of an organic molecule and the functional groups it contains determine its biological function. It has London dispersion forces and dipole-dipole forces. The reactions of alkenes. All the hydrogens in dimethyl ether (CH3OCH3) are bonded to carbon; therefore, intermolecular hydrogen bonding between dimethyl ether molecules does not take place, and its boiling point is lower than that of ethanol (CH3CH2OH), where hydrogen bonding involving the @OH group is important. USE: Ethyl bromide is used to make other chemicals and as a solvent. Hydrogen bonding is a type of intermolecular force that gets formed when a compound has hydrogen atom directly attached to highly electro-negative N, F or O atom. This happens because the strength of the intermolecular forces between the molecules is affected by the orientation of the polar (dipole) bonds. with the aid of distruption of intermolecular forces that exist in water upon freezing. Source(s): chemistry course. Recentdevelopmentsin microwavespectroscopyandthe related theory2'-10 have providedpowerfulnewtools for the studyof this phenomenon. Nohad Gresh, Gen-Bin Shi: Conformation-dependent intermolecular interaction energies of the triphosphate anion with divalent metal cations. ketone, Name the following compound. asked by Tc on July 2, 2011; chemistry. 76) Which intermolecular force is primarily responsible for the interactions among alkane molecules? Answer: Van der Waal's or London forces. Which has the smallest dipole-dipole forces? a) Cl2 b) CH3CH2Cl c) H2Se d) PH3. 6) Place the following compounds in increasing order of intermolecular forces.
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