Question

What is the degree of freedom of a gaseous mixture composed of CH4, CO2, H2CO3, H2O and H2O2?

(a) 1

(b) 2

(c) 3

(d) 4

This question was addressed to me in unit test.

I need to ask this question from Gibbs Phase Rule in section Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

Answer 1

Right option is (d) 4

Easiest explanation: F = 2 – 1 + 3 = 4.