Question

When heat is supplied to a solid, the molecules vibrate but do not leave their positions. Why is this behavior observed?

Molecules do not have enough kinetic energy to overcome the intermolecular bonds.

Molecules have enough kinetic energy to overcome the intermolecular bonds.

Molecules do not have enough kinetic energy to overcome the pressure between the molecules.

Molecules do not have enough potential energy to overcome the pressure between the molecules.

Answer 1

option  A is answer that is Molecules do not have enough kinetic energy to overcome the intermolecular bonds.

Answer 2

Answer: The correct statement is molecules do not have enough kinetic energy to overcome the intermolecular bonds.

Explanation:

Kinetic energy is defined as the energy which is possessed by the virtue of particle's motion. It depends upon the temperature of the system.

If temperature of the system is high, the particles will move faster and have high kinetic energy and vice-versa.

In solid state, the particles are closely packed and the intermolecular forces of attraction between the particles is more. So, when heat is supplied to solid, the kinetic energy of the particles increases which means that the particles starts vibrating.

It is also given that the molecules are not leaving their positions, which means that the intermolecular forces have not been overcome.

Hence, the kinetic energy is not enough to overcome the intermolecular bonds.