Latent heat is the amount of energy needed to change the state of a substance without causing a change in temperature.
Types of latent heat
Latent heat of fusion:-Latent heat of fusion is defined as the amount of heat energy needed to transform of a solid into a liquid at its melting point.
Latent heat of vaporization:-Latent heat of vaporization is the term for the heat that a substance absorbs when it transforms from a liquid to a gas.