Question

What is the total pressure of a system having 40% O2 with 5 atm partial pressure and 60% N2 with 10 atm partial pressure?

(a) 2 atm

(b) 6 atm

(c) 8 atm

(d) 10 atm

I had been asked this question in a national level competition.

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

Answer 1

The correct choice is (c) 8 atm

To elaborate: P = 0.4*5 + 0.6*10 = 8 atm.