## Voltage vs Gibbs

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

305385703
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

### Voltage vs Gibbs

Why is voltage positive when the reaction is spontaneous while the gibbs free energy is negative?

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

### Re: Voltage vs Gibbs

Is voltage negative when the gibbs free energy is positive?

Philomena 4F
Posts: 27
Joined: Wed Feb 27, 2019 12:16 am

### Re: Voltage vs Gibbs

A negative Gibbs free energy means a spontaneous reaction. From the eq deltaG= -nFE, a positive E will still result to a negative value. If it's a negative E, then deltaG would be positive since the negative sign in front of n will be cancelled out and turn to a positive sign. That in turn will be a non spontaneous reaction.