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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank First law of thermodynamics and Hess law

  • question_answer
    In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true        [CBSE PMT 2002]

    A)                 \[\Delta E=W=Q=0\]      

    B)                 \[\Delta E\ne 0,\,Q=W=0\]

    C)                 \[\Delta E=W\ne 0,\,Q=0\]         

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

    Correct Answer: C

    Solution :

              As the system is closed and insulated no heat enter or leave the system, i.e. \[q=0\] ;    \[\therefore \Delta E=Q+W=W\].


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