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  4. If Δ H and Δ S are positive for a reaction, the reaction will be spontaneous only when

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Q. If $ \Delta H $ and $ \Delta S $ are positive for a reaction, the reaction will be spontaneous only when

J & K CETJ & K CET 2013Thermodynamics

Solution:

$ \Delta G=\Delta H-T\Delta S $ for spontaneity, $ \Delta G^{\circ}<0 $ and this occurs when
$ T\Delta S>\Delta H $