1. The enthalpy of vaporization of CO2 (l) is 9.8 kJ/mol.
Would you expect the enthalpy of vaporization of CS2 (l) to be 28 kJ/mol, 9.8
kJ/mol, or _8.4 kJ/mol? Discuss the plausibility of each of these
2. Ethyl chloride (boiling point, 13 °C) is used as a local
anesthetic. When the liquid is sprayed on the skin, it cools the skin enough to
freeze and numb it. Explain the cooling effect of liquid ethyl chloride.