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Discussion :: Chemical Engineering Thermodynamics

  1. Pick out the wrong statement.

  2. A.

     Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point

    B.

     Entropy of a system decreases with the evolution of heat

    C.

     Change of internal energy is negative for exothermic reactions

    D.

     The accentric factor for all materials is always more than one

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    Answer : Option D

    Explanation :

    The acentric factor can’t always be greater than 1. For many monoatomic fluids the acentric factor is close to zero.


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