2. Compared to many other liquids, water has a high heat of vaporization, which means a relatively large amount
of heat must be added to the water before the water molecules are moving fast enough to escape the surface as a
gas, Which of the following explains why water has a high heat of vaporization?
A. Adding heat to the water causes the molecules to move around, and the motion keeps pushing
them back below the water's surface.
B. As water molecules heat up they tend to form more hydrogen bonds with each other, making it
difficult for any of the molecules to vaporize.
C. Water molecules have a relatively high molecular weight compared to other molecules, so more
energy is needed for the water molecules to vaporize.
D. Enough heat must be added to water molecules' hydrogen bonds to break the bonds and provide
the molecules enough energy to escape the surface.