Kemi
Entropisk bidrag (entropic contribution)
Hej,
jeg ville blot være sikker: er en reaktion drevet af entropi, hvis det entropiske bidrag (T* ?S) er positivt?
Svar #1
02. oktober 2017 af janhaa
Entropy-driven reaction means that the reaction takes place spontaneously because the change in entropy is positive when reaction proceeds in forward direction.
A reaction takes place spontaneously if ?G < 0. ?G=?H-T?S.
If change in entropy ?S is positive and large enough to make ?G < 0 (when ?H > 0), then the reaction proceeds in forward direction just because of positive entropy change and then the reaction is called entropy-driven reaction.
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