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What is the degree of freedom of a mixture composed of liquid O2, gaseous H2 and ice?

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What is the degree of freedom of a mixture composed of liquid O2, gaseous H2 and ice?

(a) 1

(b) 2

(c) 3

(d) 4

I had been asked this question in an interview.

This interesting question is from Gibbs Phase Rule in division Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering

1 Answer

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Right choice is (a) 1

Explanation: F = 2 – 3 + 2 = 1.

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