1. Suppose that 2 substances, X and Y, have heats of vaporization equal to 37.6 and 27.2kJ/mol, respectively. a. Which compound would you expect to have the higher boiling point? b. Which compound would be less likely to exhibit hydrogen bonding? EXPLAIN. 2. At room temperature, the vapor pressure of acetone is approximately 220 torr, whereas the vapor pressure of ethyl alcohol is 60 torr at this same temperature. Which of these substances possesses the stronger intermolecular attractions? Explain your reasoning. 3. How would you expect the heats of vaporization to vary among the compounds PH3,AsH3, and SbH3 ? Why? 4. At room temperature, solid iodine, I2, has a much higher vapor pressure than sodium chloride. Why? 5. Methyl alcohol, the fuel in canned heat, is more volatile than propylene glycol, a food additive. Which substance has the weaker intermolecular attractions? 6. What type(s) of intermolecular attractive force(s) are found in the following? a) HCl e) NO2 b) Ar f) CO2 c) CH4 g) H2S d) HF h) NH3