When to use Van't Hoff equation

[KarineKim2L]

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?

[John Liang 2I]

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!

[Rory Simpson 2F]

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).