Question

explain why there is no rise in temp of a substance when it undergoes a change of state though heat is applied continously 

Answer 1

When heat is applied in a continuous manner, it takes latent heat in usage.

As a result there is no rise in temperature of the substance even though it undergoes a change in state.

Latent heat is the heat required to convert the state of matter but without change in temperature.

Answer 2

Answer:

There is no rise in the temperature of a substance when it undergoes a change of state though heat is being supplied because heat is used to overcome inter-molecular force of attraction between the particles of the substance during a change in physical state.