Latent Heat

The heat that is either released or absorbed by a unit mass of a substance when it undergoes a change of state (e.g., during evaporation, condensation, or sublimation).

Latent heat The heat released or absorbed per unit mass by a system in a reversible isobaric-isothermal change of phase. In meteorology, the latent heats of evaporation (or condensation), fusion (melting), and sublimation of water substance are of importance.

The change in heat content that occurs with a change in phase and without change in temperature.

Heat absorbed or released during a change of phase at constant temperature and pressure.