Question

What is the molal saturation of a gas with 10 Pa partial pressure without vapor and 0.5 atm partial pressure with vapor?

(a) 0.5

(b) 1

(c) 5

(d) 101.3

This question was addressed to me during an online exam.

I'd like to ask this question from Partial Saturation Terminology topic in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

Answer 1

Correct choice is (c) 5

The explanation: Molal saturation = 0.5*101.3/10 = 5.