Question

for any substance, why does the temperature remain constant during the change of state.​

Answer 1

Answer:

Due to Latent Heat used to break inter-molecular bonds.

Explanation:

During the change of state of matter, some form of heat is used up as energy to break the inter-molecular bonds.The change of state is not possible without breaking these bonds. Hence, the temperature remains constant during change of temperature.

This is known as Latent Heat of Fusion while changing from solid to liquid, and is known as Latent Heat of Vaporization while changing from liquid to gaseous state.

Hope it helps!!! ^_^

Answer 2

Because with the increase of temperature, more number of particles get enough kinetic energy to go into the vapour state. Hence temperature remains constant during the change of state.