Question

A reaction has produced 0.4 mole of water vapor and 1 liter of bone dry air at 27oC and 5 atm, what is the humidity?

(a) 85%

(b) 143%

(c) 178%

(d) 200%

This question was posed to me during an interview.

I want to ask this question from Material Balance Problems Involving Partial Saturation topic in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

Answer 1

Right option is (d) 200%

To explain: Moles of bone dry air = 0.2, => Humidity = 0.4/0.2*100 = 200%.