Definitions for "Heat of vaporization"
Keywords:  latent, mole, vapor, boil, liquid
The amount of heat involved in the evaporation or condensation of 1 g of the substance.
Heat of vaporization is energy absorbed during the change of a mole of liquid to a vapor without a change in temperature.
the heat energy needed to change 1 gram of a substance from liquid to gas. (see heat of condensation)