## Homework Problem 14.27

$\Delta G^{\circ} = -nFE_{cell}^{\circ}$

Jared Smith 1E
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

### Homework Problem 14.27

I'm having some trouble understanding why we can't just add the two standard potentials together from the reactions to get the total. Why exactly do we convert everything to deltaG and back again?

Jonathan Tangonan 1E
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

### Re: Homework Problem 14.27

We can't add the standard potentials together because E is not a state function. But, we can make use of delta G as being a state function through the addition of the delta G values of the half reactions and then solving for the desired half reactions standard potential through the equation delta G=-nFE.

Jennie Fox 1D
Posts: 66
Joined: Sat Jul 22, 2017 3:01 am

### Re: Homework Problem 14.27

E is not a state function, so you can't simply add them together. G is a state function, so that is why we must convert to G.