Question

Give the usual name for the following Heat required to change the state of a substance without changing the temperature.

Answer 1

Answer:

the name given to the heat is latent heat of fusion or vaporization

Answer 2

The heat needed to modify a substance's state without altering its temperature is called latent heat.

Explanation:

Latent heat of fusion and the latent heat of vaporization is nothing but the heat needed to improve the state of material without modifying its temperature.

$H_2O (vapourisation) -> H_2O$

(liquid state)             (gaseous state)

Here ,

$\Delta Vap$  = latent heat of vapourisation

J is the SI unit of latent heat