NEET Sample Paper NEET Sample Test Paper-9

  • question_answer The workdone during the expansion of a gas from a volume of \[4\text{ }d{{m}^{3}}\] to \[6\text{ }d{{m}^{3}}\]against a constant external pressure of 3 atm is

    A)  \[-6\,J\]                       

    B)  \[-608\,J\]

    C)  \[+304\,J\]                 

    D)  \[-304\,J\]

    Correct Answer: B

    Solution :

    \[W=-{{P}_{ext}}\,({{V}_{2}}-{{V}_{1}})\] \[=-3(6-4)\] \[=-6L-atm\] \[=-6\times 101.32\,J\] \[(\because \,\,1\,\,L-atm=101.32\,J)\]                 \[=-608\,\,J\]

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