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Discussion :: Chemical Engineering Thermodynamics

  1. Internal energy is equal to the heat absorbed in case of a/an __________ process.

    2. A.

     Constant volume
    B.

     Polytropic
    C.

     Adiabatic
    D.

     Constant pressure

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    Answer : Option A

    Explanation :

    By first law of thermodynamics for a system undergoing only expansion work we can write $$\delta Q = dU + PdV$$
    For an isochoric process since $$dV=0$$   we can write $$\delta Q = dU.$$

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