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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Free energy and work function

  • question_answer
    \[\Delta {{G}^{o}}\] for the reaction \[X+Y\]⇌ Z is ? 4.606 kcal . The value of equilibrium constant of the reaction at \[{{227}^{o}}C\] is \[(R=2.0\,cal.\,mo{{l}^{-1}}{{K}^{-1}})\]            [Roorkee 1999]

    A)                 100

    B)                 10

    C)                 2             

    D)                 0.01

    Correct Answer: A

    Solution :

           \[\Delta {{G}^{o}}=-\,2.303\,RT\,\log K\]            \[-\,4.606=-\,2.303\times 0.002\times 500\,\log K\]                                 \[\log \,K=2,\,\,K=100\].


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