NEET Sample Paper NEET Sample Test Paper-23

  • question_answer
    n moles of an ideal gas undergo a process in which the temperature changes with volume as \[T=K{{V}^{2}}.\]The work done by the gas as the temperature changes from \[{{T}_{0}}\]to \[4{{T}_{0}}\]is:

    A) \[3nR{{T}_{0}}\]                  

    B) \[\left( \frac{5}{2}nR{{T}_{0}} \right)\]

    C) \[\left( \frac{3}{2} \right)nR{{T}_{0}}\]                   

    D)  0

    Correct Answer: C

    Solution :

    \[T=K{{v}^{2}},dT=2kvdV\]or \[dV=\left( \frac{dT}{2kv} \right)\] Further, \[P=\frac{nRT}{V},\]Now \[W=\int_{{}}^{{}}{Pdv=\int_{{}}^{{}}{\frac{nRT}{v}}.\frac{dT}{2kV}}\] \[=\int\limits_{{{T}_{0}}}^{4{{T}_{0}}}{\frac{nR}{2}dT}\,\,\]\[(as\,k{{v}^{2}}=T)\] \[=\frac{3nR{{T}_{0}}}{2}\] Hence, the correction option is [c].


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