A reaction will always be thermodynamically spontaneous if: $$ \Delta G = 0. $$ $$ \Delta H < 0 $$ and $$ \Delta S > 0. $$ it is coupled to another reaction. $$ \Delta G^* > 0. $$
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A reaction is thermodynamically spontaneous if it can proceed without external intervention. This is determined by the change in Gibbs free energy ($$ \Delta G $$). Show more…
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A reaction has a ΔH° = +25 kcal/mol and a ΔS° = +0.18 kcal/mol. Remember ΔG = ΔH - TΔS. This reaction will occur spontaneously at 298 K, and all other temperatures as well. This reaction will not occur spontaneously at any temperature. This reaction will not occur spontaneously at 298 K, but will at much higher temperatures. This reaction will occur spontaneously at 298 K, but will not at much lower temperatures.
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