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JEE Main & Advanced JEE Main Paper (Held On 09-Jan-2019 Morning)

  • question_answer
    Consider   the   reversible   isothermal expansion of an ideal gas in a closed system at two different temperatures T1 and \[{{T}_{2}}\left( {{T}_{1}}<\text{ }{{T}_{2}} \right)\]. The correct graphical depiction of the dependence of work done (W) on the final volume (V) is - [JEE Main Online Paper (Held On 09-Jan-2019 Morning]

    A)  

    B)

    C)  

    D)

    Correct Answer: A

    Solution :

    \[\left| W \right|\,\,=\,nRT\,\,In\,\,\frac{{{v}^{2}}}{{{v}^{1}}}\] \[\left| W \right|=nRT\,\,\ln {{V}_{2}}-nRT\ln {{V}_{1}}\] \[\therefore \] Intercept is negative and intercept of curve 2 is more negative.


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