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Discussion :: Chemical Engineering Thermodynamics

  1. For a constant volume process

    2. A.

     dE = CpdT
    B.

     dE = CvdT
    C.

     dQ = dE + pdV
    D.

     dW = pdV

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    Answer : Option B

    Explanation :

    Since, under constant volume process the expansion work is zero, and by the definition of CV we can write CV=limδT→0(δQδT)V
    By first law of thermodynamics
    δQ=dU⇒dU=CvdT.

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