During a phase change process like sublimation, vaporisation, melting etc., the specific ____________ does not change?
Correct answer: B. Gibbs free energy
- A. Enthalpy
- B. Gibbs free energy
- C. Internal energy
- D. Entropy
Explanation
At equilibrium during a phase change, the molar Gibbs free energies of the two phases are equal, so the specific Gibbs free energy does not change. Enthalpy and entropy do change because latent heat is absorbed or released.
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