RAJASTHAN PMT Rajasthan - PMT Solved Paper-2007

  • question_answer
    In a closed insulated container, a liquid is stirred with a paddle to increase the temperature. Which of the following is true?

    A) \[\Delta E=W\ne 0,\,\,q=0\] 

    B)        \[\Delta E=W=q\ne 0\]

    C)        \[\Delta E=W=q\ne 0\]

    D)        \[W=0,\,\,\Delta E=q\ne 0\]

    Correct Answer: A

    Solution :

    As temperature is to be increased, no heat should enter or leave the system,\[ie,\,\,q=0\] Hence,  \[\Delta E=q+W=W\]                 \[\Delta E=W\ne 0\]       and        \[q=0\]


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