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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-6

  • question_answer
    A container having 1 mole of a gas at temperature \[27{}^\circ C\] has a movable piston which maintains at constant pressure in container of 1 atm. The gas is compressed until temperature becomes \[127{}^\circ C\]. The work done is (\[{{C}_{p}}\] for gas is 7.03 cal/mol-K)

    A)  703 J                                    

    B)  814 J

    C)  121 J                                    

    D)  2035 J

    Correct Answer: B

    Solution :

    At constant pressure \[W=p\Delta V=\mu R\Delta T\] \[=1\times 8.31\times 100=831\] \[\approx 814\,\text{J}\]


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