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

  • question_answer
    For spontaneity of a cell, which is correct [Orissa JEE 2004]

    A)                 \[\Delta G=0,\,\Delta E=0\]

    B)                 \[\Delta G=-ve,\,\Delta E=0\]

    C)                 \[\Delta G=+ve,\,\Delta E=+ve\]

    D)                 \[\Delta G=-ve,\,\Delta E=+ve\]

    Correct Answer: D

    Solution :

               \[\Delta G=\Delta H-T\Delta S\];  \[\Delta G=\Delta E+P\Delta V-T\Delta S\]                    For spontaneity \[(\Delta G=-ve)\]                                 \[\because \]  \[\Delta G=-ve\], \[\Delta E=+ve\]


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