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

  • question_answer
    The free energy for a reaction having \[\Delta H=31400\,ca;\]. \[\Delta S=32\,cal\,{{K}^{-1}}\,mo{{l}^{-1}}\] at \[{{1000}^{o}}C\] is         [Orissa JEE 2005]

    A)                 ? 9336 cal           

    B)                 ? 7386 cal

    C)                 ?1936 cal            

    D)                 + 9336 cal

    Correct Answer: A

    Solution :

               \[\Delta G=\Delta H-T\Delta S=31400-1273\times 32\]                                 \[=31400-40736=-9336\,cal\]


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