Question

What is the vapor pressure of 50% gas in a system with partial pressure 2 mm Hg?

(a) 1 mm Hg

(b) 2 mm Hg

(c) 4 mm Hg

(d) 8 mm Hg

This question was posed to me in class test.

Query is from Vapor-Liquid Equilibria in Binary Systems topic in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

Answer 1

The correct answer is (c) 4 mm Hg

The explanation: P = 2/0.5 = 4 mm Hg.