Question

Why is there no change in the temperature when the process of melting takes place?

A).Because the supplied heat is used to overcome the force of attraction between the molecules.
B).Because the supplied heat is used to increase the movement between the molecules.
C).Because the supplied heat is used to increase the kinetic energy of the molecules.
D).Because the supplied heat is used to overcome the force of repulsion between the molecules.
E).Because the supplied heat is used to decrease the kinetic energy of the molecules.

Answer 1

The energy is used to break bonds in order to overcome the intermolecular attractions. A is correct.

Answer 2

Answer: Option (A) is the correct answer.

Explanation:

During the process of melting, there is no change in the temperature because the supplied heat is used to overcome the force of attraction between the molecules.  

The heat supplied to the substance at constant temperature is actually absorbed by the molecules of the substance. As a result, force of attraction between the molecules decreases and the substance changes from solid to liquid state.  

This heat is also known as latent heat which means the heat is hidden as it does not result in increase in temperature.