Question

What is the total pressure of a system having 50% H2CO3 with 6 atm partial pressure and 50% O2 with 12 atm partial pressure?

(a) 3 atm

(b) 6 atm

(c) 9 atm

(d) 12 atm

I got this question during an interview.

My doubt stems from Vapor-Liquid Equilibria in Binary Systems topic in portion Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

Answer 1

Correct answer is (c) 9 atm

The best explanation: P = 0.5*6 + 0.5*12 = 9 atm.