60. Ar equilibrium the total Gibb's free energy for all phases is
(A) Minimum
(B) Maximum
(C) Infinity
(D) Zero
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- (A) Minimum
When both temperature and pressure are held constant, chemical potential is the partial molar Gibbs free energy. At chemical equilibrium or in phase equilibrium the total sum of the product of chemical potentials and stoichiometric coefficients is zero, as the free energy is at a minimum.
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