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KarineKim2L wrote:How can we assume that the standard delta H and standard delta S are constant when deriving the Van't Hoff equation? Do these values not differ with temperature?
Lavelle mentioned in class that although having a higher temperature will indeed increase the initial and final H and S values, the change of H and S will remain constant since both values (final and initial) will increase the same amount. Since these are state functions, that's why we can assume constant delta H and S despite different temperatures. hope it helps!
The changes in are generally negligible with a change in temperature so we just assume that they are constant when deriving (delta G, on the other hand, does change significantly with temperature changes).
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