Question

If the gas phase composition of a component A is 0.65 and its relative volatility is 2. Find the liquid phase composition.

(a) 0.48

(b) 0.58

(c) 0.68

(d) 0.78

The question was posed to me by my school principal while I was bunking the class.

My question is based upon Distillation-Vapour Liquid Equilibria in section Distillation of Mass Transfer

Answer 1

Correct answer is (a) 0.48

Easy explanation: Relative volatility= 0.65/(1-0.65) * (1-x)/x

                                 2= 1.85 * (1-x)/x ; x= 0.48.