Question

What is the humid volume of the system at 150oF with humidity 50%?

(a) 12.4 ft3/lb

(b) 19.5 ft3/lb

(c) 27.7 ft3/lb

(d) 36.1 ft3/lb

I have been asked this question during an internship interview.

I'm obligated to ask this question of Humidity (Psychrometric) Chart topic in portion Humidity Charts & their Use, Analysis of the Degrees of Freedom in a Steady – State Process, Solving Material and Energy Balances Using Process and Unsteady State Material and Energy Balances of Basic Chemical Engineering

Answer 1

The correct answer is (c) 27.7 ft3/lb

The best I can explain: V = (0.73*150 + 336)(1/29 + 0.5/18) = 27.7 ft3/lb.