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Discussion :: Chemical Engineering Thermodynamics

  1. Specific/molar Gibbs free energy for a pure substance does not change during

    2. A.

     Sublimation
    B.

     Vaporisation
    C.

     Melting
    D.

     Either A, B or C

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    Answer : Option D

    Explanation :

    During the phase change the gibbs free energy doesn’t change since the pressure and temperature are remained constant during phase change.
    For single component and closed system : dG=VdP−SdT

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