Question

A closed flask contains water in all its three states solid, liquid and vapour at 0°C. In this situation, the average kinetic energy of water molecules will be 

(a) the greatest in all the three states 

(b) the greatest in vapour state 

(c) the greatest in the liquid state 

(d) the greatest in the solid state.

Answer 1

The correct option is : (b) the greatest in vapour state 

Explanation:

Velocity and hence average K.E. of water molecules is maximum in the gaseous state.