Van't Hoff [ENDORSED]

[austin-3b]

What type of problems do we need to use Van't Hoff equations for?

[Racquel Fox 2I]

The Van't Hoff equation is used to calculate K at different temperatures if deltaH is known

[John Calonia 1D]

We can use the Vant Hoff Equation when we know the different temperatures we are using, delta H, and the original equilibrium constant.

[Madeline Ogden 3B]

Adding onto what has already been said, the Van't Hoff equation can also look like this depending on certain conditions:
ln (k2/k1) = (-ΔH°/(RT2)) + (ΔH°/RT1) assuming that ΔS° is constant
ln (k2/k1) = (-ΔH°R) [ (1/T2) - (1/T1)] assuming that ΔH° is constant

[Chem_Mod]

Also see my class email:

"In section 5J.3 go through Examples 5J.4 and 5J.5."

[MariaCassol1L]

It depends on the information that you are given and what you are trying to solve. So if they give you two K values for two different temperatures, that is a clue that the van't Hoff equation can be used. If you are ever unsure on what equation to use write down everything you know and what do you need to find out and see what equation fits best.

[Lauren Sarigumba 1K]

The Van't Hoff equation can be used to find the enthalpy of a reaction when given two equilibrium constants and two temperature constants, I believe. Correct me if I am wrong.