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For a single component system, vapor (subscript g) and liquid (subscript f) coexist in mechanical, thermal and phase equilibrium when

(A) ug = uf (equality of specific internal energy)
(B) hg = hf (equality of specific enthalpy)
(C) sg = sf (equality of specific entropy)
(D) gg = gf (equality of specific Gibbs free energy)


Asked On2019-07-08 10:10:03 by:Gaganpreet-Gandhi

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The phase change is described by Gibbs free energy. So for the system to exist in phase equilibrium, they need to have the same Gibbs free energy. 







The answer is D.

Answerd on:2021-12-28 Answerd By:Akshay-Telmasare

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