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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Graphical Questions

  • question_answer
    When a system is taken from state i to a state f along path iaf, \[Q=50\,J\] and \[W=20J.\] Along path ibf, \[Q=35J.\] If \[W=-13J\] for the curved return path f i,  Q for this path is          [AMU (Med.) 2000]

    A)            33 J

    B)            23 J

    C)            ? 7 J                                         

    D)            ? 43 J

    Correct Answer: D

    Solution :

                       \[\Delta U\], remains same for both path For path iaf : \[\Delta U=\Delta Q-\Delta W=50-20=30J\]. For path \[fi\] : \[\Delta U=-\,30\,J\,\text{and }\Delta W=-13J\]            Þ \[\Delta Q=-\,30-13=-\,43\ J\].


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