Question

A process is carried out for the feed mixture of 90% air and 10% water vapor, the compressor recovered 90% of water, what is the exit pressure of the compressor if the partial pressure of water vapor is 50 mm Hg?

(a) 286.1 mm Hg

(b) 396.4 mm Hg

(c) 458.7 mm Hg

(d) 529.5 mm Hg

The question was asked by my college director while I was bunking the class.

My doubt is from Condensation topic in portion Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation of Basic Chemical Engineering

Answer 1

Correct option is (c) 458.7 mm Hg

Explanation: Exit components, water: 0.1*0.1 = 0.01, air: 0.9, => water = 0.0109 => Total exit pressure = 50/0.109 = 458.7 mm Hg.