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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2011

  • question_answer
    A system absorbs reversibly \[600\,\,J\] of heat and preforms \[250\,\,J\] of work. The increase in the internal energy of system is

    A) \[850\,\,J\]                        

    B) \[250\,\,J\]

    C) \[600\,\,J\]        

    D)        \[350\,\,J\]

    Correct Answer: D

    Solution :

    According to first law of thermodynamics                 \[\Delta U=q+W\] As heat is absorbed by the system, \[q=+q\] and work is done by the system,\[w=-W\] \[\therefore \]  \[\Delta U=q-W\]                        \[=600-250\]                        \[=350\,\,J\]


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