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Manipal Medical Manipal Medical Solved Paper-2011

  • question_answer
    In a given process on an ideal gas\[dW=0\]and \[dQ<0,\]then for the gas

    A)  the temperature will decrease

    B)  the volume will increase

    C)  the pressure will remain constant

    D)  the temperature will increase

    Correct Answer: A

    Solution :

     From first law of thermodynamics, \[dQ=dU+dW\] we have        \[dQ=dU\]       (as\[dW=0\]) But           \[dQ<0\] \[dU<0\] \[N{{C}_{V}}\Delta T<0\] or             \[\Delta T<0\] Hence, the temperature will decrease.


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