Evaporation

Evaporation : The process of conversion of a liquid into its vapours at room temperature is called evaporation. Evaporation causes cooling.

Actually, during evaporation, the molecules having higher kinetic energy escape from the surface of the liquid. Therefore cooling takes place during evaporation because of temperature of liquid is directly proportional to average kinetic energy.

Evaporation

Evaporation is affected by following factors :

(i)   Nature of liquid

(ii)  Temperature

(iii) Surface area