Question

What is latent heat of vaporisation ? In simple language.

Answer 1

The amount of heat energy absorbed at constant temp by unit mass of a liquid to convert into gaseous phase is called the specific latent heat of vapourization

Answer 2

Hey !!

The amount of heat required to change the temperature the state of unit mass of a substance from liquid to vapour at its boiling point is called latent heat of vaporisation.

In case of water the latent heat of vaporisation is 526 cal/gm

NOTE :- Latent heat of vaporisation is more than the latent heat of fusion. This is because when a substance gets converted from liquid to vapour, there is a large increase in volume. Hence, more amount of heat is required. But when a solid gets converted to a liquid, then the increase in volume is negligible.

Hence, very less amount of heat is required.

GOOD LUCK !!