N the number of moles of electrons times staradate constant times the cell voltage. Now, from before, we know that the change in Gates free Energy can Also Be Expressed as negative r times T.
Well, R is the Gas constant at T's temperature in Kelvin times our Natural log of our K, our equilibrium constant expression on The Standard Conditions. Now, what we can do is set these guys equal. Why? Well, because this and this are the same expressions, because they both equal the same thing. Namely change in Gibbs free energy.