Question

A vessel contains air and vapor H2O, if the partial pressure of vapor H2O is 4 atm and pressure of air is 1 atm, what is the fraction of vapor H2O in vessel?

(a) 0.25

(b) 0.5

(c) 0.75

(d) 0.8

This question was addressed to me in semester exam.

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

Answer 1

Correct option is (c) 0.75

The best explanation: yH2O = 15/(15 + 5) = 0.75.