Finding Standard Cell Potential

[Gwen Peng 1L]

If you are given 2 half reactions and their standard cell potentials then you are asked to find the standard cell potential of the combined reaction, why do you have to find the Gibbs Free Energy of each half reaction and combine them to find the standard cell potential of the reaction rather than just combining the standard cell potentials of the half reactions?

[Curtis Wong 2D]

Because in this case, you're not finding the Standard Cell Potential where the electrons cancel everything out evenly. You're combining two half-reactions to form a half-reaction, which is why we have to do a different method of finding the Gibbs Free Energy, because Gibbs Free energy is a state function.