Lewis strcture of methanol: Primary Intermolecular forces: Hydrogen bonds. B.P: 78o C
Lewis structure of Ethane:It is non-polar and Hence only dispersion forces. B.P: -89 o C
1) The two liquids form an Non-Ideal solution. total volume is less than the individual liquids before mixing as the molecules attact each other. Examples are alcohol and water mixture. Hydrogen bonds are the forces.
2) Final temperature is higher because bonds are formed between the molecules A-B(Exothermic) and bonds break between A-A and B-B (both endothermic)
3) Reduction in volume clearely says that the two liquids participate in the reaction and new bond formation takes place between A-B which is Exothermic so the final temperatue is higher than the temperature before mixing.
4)If the final temperature is lower than the temperature before mixing, it implies that the heat is consumed for the bond breaking between the molecules.
1. Write Lewis structures of methanol, CH,OH and ethane, CH3 CH3. What intermolecular forces exist in...
10. (10 pts.) Identify the intermolecular forces present in the following compounds: Compound Intermolecular forces H- N- H H₃C CH₂ ç CC-C1 a. Which compound would you expect to have the higher boiling point? b. Justify your selection. C. Which compound would you expect to have the highest vapor pressure? d. Justify your selection.
2. What types of intermolecular forces are present in the following Compounds. H H Н.С H H-C-C-O-H C=C H H H CH 3. What types of intermolecular forces are exhibited by the following compounds? Which has a higher boiling point? Br H H-C C-H C H H C- H 4. Why is the boiling point of A- propylamine is higher than the boiling point of B -triethylamine despite the fact that they have the same molecular formula (C3HgN) CH3 H3C...
1. What type of intermolecular force is predominant in the following two compounds? H3C -C-CH3 H3C- CH-CH (3 points) 2. Hydrazine (NH2NH2), hydrogen peroxide (HooH), and water (H20) all have higher boiling points in comparison with other substances of comparable molecular weights. What structural property do these substances have in common, and how might that account for (4 points) their high boiling points? 3. The most significant factor which is responsible for the higher boiling point of ethanol C2H5OH, compared...
a) Which type of intermolecular forces accounts for the differences in boiling points in these three compounds? 1) Methanol CH,OH 2) 2-Methylpropane Сн, H₃ C CH₃ 3) Acetone H₃C/ CH3 b) Determine the order of highest to lowest boiling points: Highest bp Lowest bp
1. Draw the Lewis dot structure for methanol, CH3OH. Is this molecule polar? What is its dipole moment? In what molecular direction does the dipole point. Draw or illustrate this. Compare and contrast methanol with ethane, C2H6. Compare and contrast their intermolecular forces of attraction that operate between molecules in the bulk liquids. Illustrate these. Look up and explain their differences in boiling points.
and explain why this is? 6.86. Ethanol, CH3 CH, OH (l), and dimethyl ether, CH3 OCH; (C), have the same compositional formula C2H60. By reference to forces between the molecules in samples of each, predict which has the higher boiling point.
3. What is necessary for an intermolecular hydrogen bond? 4. What intermolecular forces are found in each molecule CO N2 CH,OH 5. Which substance has the highest boiling point? Why? СО CH,OH N2 6. How many compounds, of the ones listed below, have hydrogen bonding, circle them? (Hint: draw the molecules) CH3CH2)2NCH2CH3 CH3CH2NHCH.CH CH3CH2CH2NH2
Chemistry 2 help with lab questions! Intermolecular forces are not chemical bonds. Explain the difference. When answering the rest of the essay questions, use language that clearly distinguishes between chemical bonds and intermolecular forces. Why do compounds with higher intermolecular forces have higher boiling points? Show that you understand why a higher temperature is needed to boil a compound that has stronger intermolecular forces. Which has greater dispersion forces, hexane or pentane? How can you use their molecular formulas to...
The following compounds are given: 7. The following compounds are given: CH₃ H3C-C-CH3 CH₂ Cts o n on OH 1. Which compound will have the lowest boiling point? 2. Which compound will have the highest boiling point? 3. Which compound/s will be soluble in C.H14? 4. Which compound/s will be soluble in water? 5. Which compound has the highest intermolecular forces? 6. Rank all 5 compounds from lowest to highest solubility in water
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...