Why does a liquid's rate of evaporation increase when the liquid is heated?

liquid's rate of evaporation increase when the liquid is heated, due to the increase in the kinetic energy of liquid molecules.

Explanation: In liquids mostly molecules are attracted to other molecules by the process of Van der Waals attraction or dipole dipole forces like hydrogen bonds in water. These forces are weaker than covelent bonds. As the temperature of a liquid is increased, the kinetic energy of molecules also increases. Which causes the faster movement of molecules, due to this faster movement the weak dipole interactions between molecules breaks. As the interactions breaks, molecules will leave the surface of liquid turning into vapor. Hence by increasing the temperature of liquid the rate of evaporation can also be increased.

the conversion of liquid to vapours is a change in state of a system from one state to other

there are basic two differences between three states of matter

1. thermal energy: gas has highest thermal energy tthen liquid and least us of solids

2. intermolecular forces of attractions

solids have highest intermolecular forces of attraction, then liquid and least in gas

sovas we increase the temperature the forces if attraction decrease s and thermal energy increases.

So when we heat liquid more moleculws gets energised attaining thermal motion in the range of gas thus the rate if evaporation increases.