delta G = -nFE

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

Tai Metzger 3K
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am

delta G = -nFE

Hi! I was wondering why there is a negative at the start of this equation. Thanks!

Brianna Becerra 1B
Posts: 117
Joined: Fri Aug 02, 2019 12:16 am

Re: delta G = -nFE

If a process is spontaneous, then E is a positive value. Due to the set up of the equation, this also means that if a process is spontaneous, then delta G is equal to a negative value. Both of these rules apply with the negative symbol applied to the equation.

Amanda Lin 2I
Posts: 101
Joined: Sat Aug 17, 2019 12:15 am

Re: delta G = -nFE

The amount of energy that leaves the system is -w.
wmax = ΔG = -nEF

Leslie Almaraz 4G
Posts: 99
Joined: Fri Aug 02, 2019 12:16 am

Re: delta G = -nFE

a positive E value will result in a negative delta G meaning it is spontaneous

505316964
Posts: 95
Joined: Thu Jul 11, 2019 12:17 am

Re: delta G = -nFE

Consider the cell Ag(s)uAg1(aq, 5.0 mmol?L21)uuAg1(aq, 0.15 mol?L21)uAg(s). Can this cell do work? If so, what is the maximum work that it can perform (per mole of Ag)?

Hello using this equation for 6N17 gives you max work as a positive value. Based off the equation shouldn't it be negative?

Jasmine W 1K
Posts: 49
Joined: Sat Sep 07, 2019 12:18 am

Re: delta G = -nFE

The negative is to make sure that when E is positive, delta G will be negative, meaning that the reaction would be spontaneous.

Elizabeth Harty 1A
Posts: 125
Joined: Sat Jul 20, 2019 12:16 am

Re: delta G = -nFE

For these type of reactions what does it mean if the reaction is spontaneous?