Question

A liquid is in equilibrium with its vapour at it's boiling point. On the average, the molecules in the two phases have equal

(a) inter-molecular forces

(b) potential energy

(c) kinetic energy

(d) total energy

Answer 1

Correct option (c) kinetic energy

Explanation:

In, liquid ⇋ vapour, equilibrium the rate at which molecules escape from the liquid surface to gaseous phase equals the rate at which molecules in the gas phase strikes the surface and becomes the part of liquid. Hence, the molecules in the two phases have equal kinetic energy.