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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Isothermal Process

  • question_answer
    The latent heat of vaporisation of water is 2240 J/gm. If the work done in the process of expansion of 1 g is 168 J, then increase  in internal energy is    [Pb. PET 1998; CPMT 2000]

    A)            2408 J                                      

    B)            2240 J

    C)            2072 J                                      

    D)            1904 J

    Correct Answer: C

    Solution :

               \[\Delta Q=\Delta U+\Delta W\]\[\Rightarrow \Delta U=\Delta Q-\Delta W=2240-168=2072\ J\].


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