# The amount of heat transfered to convert unit mass of solid to vapour or vice versa is called as.

## The amount of heat transfered to convert unit mass of solid to vapour or vice versa is called as

a. latent heat of vaporization

b. latent heat of fusion

c. latent heat of sublimation

d. specific heat

Correct Answer : c. latent heat of sublimation

**Explanation :**

The amount of heat transfer required to cause a phase change in unit mass of a substance at constant volume and temperature is called as latent heat. There are three types of latent heat as there are three phases solid, liquid, gas or vapour. The amount of heat transfer required to melt unit mass into liquid or liquid into solid is the latent heat of fusion *(l*_{fu}). The latent heat of vaporization *(l*_{vap}) is the amount of heat transfer required to vaporise unit mass of liquid into vapour or vice versa. The latent heat of sublimation *(l*_{sub}) is the amount of heat transfer required to convert unit mass of solid into vapour of vice versa.