Posted: Sun Feb 17, 2019 9:12 pm
When enthalpy change and entropy change are negative, why does the spontaneity depend on temperature?
Re: Spontaneous Reaction
Posted: Sun Feb 17, 2019 9:26 pm
The equation ∆G=∆H-T∆S shows that even if ∆H and ∆S are negative, T can change the value of the second term and affect spontaneity. More specifically, if ∆S is negative, then the second term would be positive, and if T were great enough, it would make ∆G positive, which would make it non spontaneous even if ∆H and ∆S were negative.