Question

1 mole glucose reacts completely with excess air, if 25 liter of bone dry air is produced at 27^oC and 5 atm, what is the humidity?

(a) 40%

(b) 80%

(c) 120%

(d) 160%

The question was posed to me during an interview.

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

Answer 1

The correct option is (c) 120%

To explain: Moles of bone dry air = 5, moles of H2O produced = 6, => humidity = 6/5*100 = 120%.