delta G = -nFE

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

delta G = -nFE

Postby Tai Metzger 3K » Tue Feb 25, 2020 10:09 pm

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

Postby Brianna Becerra 1B » Tue Feb 25, 2020 10:16 pm

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

Postby Amanda Lin 2I » Tue Feb 25, 2020 10:23 pm

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

Postby Leslie Almaraz 4G » Fri Feb 28, 2020 3:34 pm

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

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

Re: delta G = -nFE

Postby 505316964 » Sun Mar 01, 2020 2:43 pm

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

Postby Jasmine W 1K » Sun Mar 01, 2020 4:58 pm

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

Postby Elizabeth Harty 1A » Sun Mar 01, 2020 5:02 pm

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

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