Specific ____________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.)?
Correct answer: B. Gibbs free energy
- A. Entropy
- B. Gibbs free energy
- C. Enthalpy
- D. Internal energy
Explanation
At phase equilibrium, the specific Gibbs free energy, or chemical potential, is equal in the coexisting phases. Entropy, internal energy, and enthalpy generally change during melting, vaporisation, or sublimation.
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