Question

1swer the following questions in detail.
In terms of kinetic theory explain the process of melting of a solid.
Physic​

Answer 1

Answer:

Explanation:

• The molecules in a solid are fixed at their place but can only vibrate about their mean position. On heating, its molecules gain more kinetic energy and start to vibrate rapidly. After a time their molecules gain so much energy to overcome the mutual forces of attraction and therefore it melts.

• On increasing the temperature of solids, the kinetic energy of the particles increases. Due to the increase in kinetic energy, the particles start vibrating with greater speed. The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point.

• In order to understand my answer you must have the basic knowledge of KMT (Kinetic Molecular Theory)

         Well according to KMT :

       

• Gasses consist of a large number of tiny particles that are far apart as compared to their size.

• Gas particles are in continuous motion and posses KINETIC ENERGY.

• Collision between gas particles and the container is completely elastic.

• There are no forces of attraction between gas atom/molecules.

• The temperature of gas is directly proportional to the AVERAGE KINETIC ENERGY.

• Now this Gas KMT theory is almost the same for liquid and solids except molecules/atoms in solids are very congested and they have a strong force of attraction between them. Now your question “What is the process of melting in terms of KMT?”

• In terms of KMT when we provide enough energy to the particles of solid so they can start vibrating on there mean position the solid starts melting and the amount of energy require by a particle is directly proportional to the intermolecular forces of attraction between molecules. If the forces will be strong it will be difficult and would require more energy by a single atom to vibrate on its mean position.