Question

What us latent heat of vaporisation?

Answer 1

The amount heat required to convert unit mass of liquid into its vapour state without change in its temperature called is latent heat of vaporization.

The latent heat of vaporization of water is 540 cal/g/°C.

 here is the answer

Answer 2

the amount of heat energy that is required to change unit mass of liquid into vapour at atmospheric pressure at it's boiling point is called latent heat of vaporization