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EAMCET Medical EAMCET Medical Solved Paper-2010

  • question_answer
    One mole of an ideal gas \[\left( \gamma =1.4 \right)\]is adiabatically compressed so that its temperature rises from 27°C to \[35{}^\circ C\]. The change in the internal energy of the gas is \[(R=8.3\text{ }J\text{ }mo{{l}^{-1}}{{K}^{-1}})\]

    A)                 -266 J                                    

    B)                  166 J

    C)                  -268 J                                   

    D)                  168 J

    Correct Answer: B

    Solution :

                     The change in the internal energy of the gas                 \[\Delta U=\frac{R({{T}_{2}}-{{T}_{1}})}{(\mu -1)}\]                 \[=\frac{8.3(35-27)}{(1.4-1)}=\frac{8.3\times 8}{0.4}\]                 \[\Delta U=166\,J\]


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