What is specific latent heat of vaporization of a liquid?
The specific latent heat of vaporization of a liquid is the amount of heat energy that is required to vaporize (or turn into a gas) a certain mass of the liquid at a constant temperature. The specific latent heat of vaporization is usually expressed in units of energy per unit mass (e.g. joules per gram).
Example: Latent heat of vaporization of water is 540 cal/gm which means that 540 calorie of heat energy is required to change the water having mass 1 kg into vapour at constant temperature.