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JEE Main & Advanced Physics Thermodynamical Processes JEE PYQ-Thermodynamical Processes

  • question_answer
    A gas is compressed from a volume of \[2{{m}^{3}}\] to a volume of \[1{{m}^{3}}\] at a constant pressure of \[100N/{{m}^{2}}.\] Then it is heated at constant volume by supplying 150 J of energy. As a result, the internal energy of the gas:   [JEE ONLINE 19-04-2014]

    A)  increases by 250 J

    B)       decreases by 250 J

    C)  increases by 50 J

    D)       decreases by 50 J

    Correct Answer: A

    Solution :

    [a]
    As we know, (Ist law of thermodynamics)
    or
    Thus the internal energy of the gas increases by 250 J


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