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  1. Enthalpy 'H' is defined as

    2. A.

     H = E - PV
    B.

     H = F - TS
    C.

     H - E = PV
    D.

     None of these

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    Answer : Option C

    Explanation :

    Enthalpy of a substance is defined as the internal energy of the substance + pressure energy per unit mass of the substance.
    The reason for defining such kind of relationship is that under constant pressure system the change of this property (enthalpy) denotes the heat added or removed from the system.

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