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Discussion :: Chemical Engineering Thermodynamics

  1. Specific __________ does not change during phase change at constant temperature and pressure.

    2. A.

     Entropy
    B.

     Gibbs energy
    C.

     Internal energy
    D.

     Enthalpy

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    Answer : Option B

    Explanation :

    We know specific Gibbs free energy is:
    dG=vdp−sdT     for pure substance so, under constant temperature and pressure the gibbs free energy is equal to zero.

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