Question

Explain the following phenomenon in the light of kinetic theory:a) melting. b) freezing .c) vapourisation. d) condensation​

Answer 1

Answer:

a.  Hello!! →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.

b.  As a liquid is cooled its molecules lose kinetic energy and their motion slows. When they've slowed to where intermolecular attractive forces exceed the collisional forces from random motion, then a phase transition from liquid to solid state takes place and the material freezes

c. Solution : According to Kinetic theory, molecules of liquid are in a state of continuous random motion. ... Such molecules would move around freely in the space above the liquid. This is the phenomenon of evaporation which may occur at all temperature.

d.  The explanation of condensation can be found in the kinetic-molecular theory of gases . As heat is removed from a gas, the molecules of the gas move more slowly, and as a result, the intermolecular forces are strong enough to pull the molecules together to form droplets of liquid.