Question

Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure?

(a) container 1

(b) container 2

(c) container 3

(d) the vapor pressure of the liquid will remain the same irrespective of it’s temperature

I have been asked this question during a job interview.

This interesting question is from Vapor Pressure in chapter Properties of Fluids of Fluid Mechanics

Answer 1

The correct option is (c) container 3

For explanation I would say: Higher the temperature, higher is the molecular activity and consequently, higher is the vapor pressure of a given liquid. Since, container 3 is at the highest temperature, liquid in it will have the highest vapor pressure.