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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Isobaric and Isochoric Processes

  • question_answer
    A gas is compressed at a constant pressure of \[50N/{{m}^{2}}\] from a volume of \[10{{m}^{3}}\] to a volume of \[4{{m}^{3}}\]. Energy of 100 J then added to the gas by heating. Its internal energy is    [MNR 1994]

    A)            Increased by 400 J             

    B)            Increased by 200 J

    C)            Increased by 100 J             

    D)            Decreased by 200 J

    Correct Answer: A

    Solution :

                       From FLOT \[\Delta Q=\Delta U+\Delta W\]\[=\Delta U+P\Delta V\] \[\Rightarrow \ 100=\Delta U+50\times (4-10)\Rightarrow \Delta U=400\ J\]


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