Question

What is the partial pressure of a 70% gas in a system, if H = 5 mm Hg?

(a) 3.5 mm Hg

(b) 7 mm Hg

(c) 14 mm Hg

(d) 35 mm Hg

The question was asked in a national level competition.

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

Answer 1

Correct option is (a) 3.5 mm Hg

Explanation: Partial pressure = 0.7*5 = 3.5 mm Hg.