[THC]

http://en.wikipedia.org/wiki/Nernst_Equation

What if I want to calculate E for T = 400 K?
I only know E^0 at 298 K... does it make a big difference if I use the E^0 at T = 298?

[Kryolith]

The first formula has the term RT/zF with T=temperature. So what's the problem?

[Borek]

The first formula has the term RT/zF with T=temperature. So what's the problem?

Phase transition.

[Yggdrasil]

E^o will change with temperature, so you would have to find the value of E^o at 400K.

[THC]

The first formula has the term RT/zF with T=temperature. So what's the problem?

Phase transition.

That too, but consider a reaction A (aq) + B (s) -> C (s) + D (aq), where all the reactants and products are in there standard state. Then what if T= 400 K? ln 1 = 0, so E = E0 anyway, even though the temperature is wrong.

E^o will change with temperature, so you would have to find the value of E^o at 400K.

My conclusion too, but different values of E0 are rarely provided. Is it safe to assume that E is independent of T at relatively small derivations from T = 298 K?