## Total Entropy

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

JukaKim_1D
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Joined: Fri Sep 25, 2015 3:00 am

### Total Entropy

Why is it that a reaction is spontaneous if the total entropy is greater than zero but unpredictable if the entropy of the system is greater than 0? (Problem 9.73)

Chem_Mod
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### Re: Total Entropy

the deltaG of the system determines spontaneity. Recall that G=H-TS so even if the system increases in entropy, if the enthalpy is very unfavorable (endothermic, requiring input of energy), the process overall still could be non-spontaneous.