Question

10 mole glucose reacts completely with excess air, if 25 liter of bone dry air is produced at 27^oC and 30 atm, what is the humidity?

(a) 100%

(b) 200%

(c) 300%

(d) 400%

I had been asked this question in final exam.

This is a very interesting question from Material Balance Problems Involving Partial Saturation topic in portion Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

Answer 1

Right choice is (b) 200%

To explain: Moles of bone dry air = 30, moles of H2O produced = 60, => humidity = 60/30*100 = 200%.