Specific/molar Gibbs free energy for a pure substance does not change during________________?
Correct answer: A. Either A, B. or C.
- A. Either A, B. or C.
- B. Vaporisation
- C. Melting
- D. Sublimation
Explanation
At equilibrium, the molar Gibbs free energy, or chemical potential, is identical in the phases of a pure substance. Thus it remains unchanged during sublimation, vaporisation, or melting when the phase change occurs at equilibrium.
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