Question

Intermolecular hydrogen bonding increases the enthalpy of vaporization of a liquid due to the :

• A. Decrease in the attraction between molecules.
• B. Increase in the attraction between molecules.
• C. Decrease in the molar mass of unassociated liquid molecules.
• D. Increase in the effective molar mass of hydrogen-bonded molecules.

Answer 1

Answer: (B)

Increase in the attraction between molecules.

Answer 2

$\Delta$Hvap $\propto$intermolecular force of attraction.