Refer to the figures below. Which compound would have a higher heat of vaporization than water, and why?

Question

Refer to the figures below.  Which compound would have a higher heat of vaporization than water, and why?

Quizplus · Accepted Answer

The heat of vaporization is the energy required to transform a given quantity of a substance from a liquid into a gas at a constant temperature. Hydrogen bonding is a type of intermolecular force between molecules that is responsible for a higher heat of vaporization in some substances, such as water. Compound B can form more hydrogen bonds per molecule than water, therefore it would require more energy to vaporize and have a higher heat of vaporization than water. Compound A does not have the ability to form hydrogen bonds, so it would not have a higher heat of vaporization than water. Compound C containing more oxygen atoms per molecule than water is not directly correlated to the heat of vaporization, so it is not a correct choice.

Refer to the Figures Below