Question

3. (a) During change of state, temperature does not
rise or fall. What happens to the heat energy
supplied or given out? Explain.
(b) Explain the change of state from solid to liquid
on the basis of kinetic theory.​

Answer 1

Answer:-

1.This is all Because, when any substance undergoes in change of its state, than its temperature did not increase if even heat is supplied continuously, but that heat is (you can say absorbed) taken by that substance in the form of latent heat, that's why the Temperature didn't change. And

When we heat a solid, the energy supplied is used to increase the kinetic energy of its molecules, and thereby its temperature increases. ... Similarly, energy is required to vaporize a liquid, because in so doing the molecules are separated and molecular attractive forces are overcome.

2.When a solid is heated, the kinetic energy of the molecules increases. ... When the kinetic energy possessed by the molecules reaches the point where it completely overcomes the intermolecular force, the state changes and the solid turns into a liquid.

Hope it helps.