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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2012

  • question_answer
    If\[\Delta H=-\text{ }25kcal,\text{ }T=300\text{ }K\]and\[\Delta S=9\text{ }cal,\] then the reaction is

    A)  spontaneous                   

    B)  non-spontaneous

    C)  equilibrium state            

    D)  None of these

    Correct Answer: A

    Solution :

                    \[\Delta G=\Delta H-\Delta .S\] \[\because \]     \[\Delta H=-25\,kcal=-25000\,cal\]                 \[T=300K,\text{ }\Delta S=9cal\] \[\Delta G=-25000-300\times 9\] \[=-25000-2700\] \[\Delta G=-27700\text{ }cal\] The value of \[\Delta G\]is negative, hence the reaction is spontaneous.


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