eThermo Thermodynamics & Transport Properties Calculation » Latent Heat of Vaporization

Latent Heat of Vaporization The enthalpy of vaporization, (symbol ∆Hvap) also known as the (latent) heat of vaporization or heat of evaporation, is the enthalpy change required to transform a given quantity of a substance from a liquid into a gas at a given pressure (often atmospheric pressure, as in STP).