Question

A system has partial pressure 500 mm Hg and the saturated water vapor has partial pressure 25 mm Hg, what is the fraction of water vapor in the system?

(a) 0.01

(b) 0.05

(c) 0.1

(d) 0.5

I got this question in an interview for job.

This is a very interesting question from Saturation topic in division Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation of Basic Chemical Engineering

Answer 1

The correct choice is (b) 0.05

The explanation is: Fraction of water vapor = 25/500 = 0.05.