BCECE Engineering BCECE Engineering Solved Paper-2005

  • question_answer
    In isochoric process:

    A)  \[\Delta U=\Delta Q\]                                  

    B)         \[\Delta Q=\Delta W\]

    C)         \[\Delta U=\Delta W\]                                 

    D)         none of these

    Correct Answer: A

    Solution :

    An isochoric process is a constant volume process. In an isochoric process \[\text{V}\,\text{=}\]constant or \[\Delta V=0\] So, work done \[\Delta W=P\Delta V=0\] From first law of thermodynamics                 \[\Delta Q=\Delta U+\Delta W\]                 \[\Rightarrow \]               \[\Delta Q=\Delta U\] Note: P.V diagram of isochoric process is a straight line parallel to P-axis.


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