Question

6 mole glucose reacts completely with excess air, if 25 liter of bone dry air is produced at 27^oC and 20 atm, what is the humidity?

(a) 20%

(b) 80%

(c) 145%

(d) 180%

I have been asked this question in examination.

Asked question is 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 answer is (d) 180%

For explanation I would say: Moles of bone dry air = 20, moles of H2O produced = 36, => humidity = 36/20*100 = 180%.