delta G=-nFE


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205389184
Posts: 100
Joined: Sat Sep 07, 2019 12:18 am

delta G=-nFE

Postby 205389184 » Sun Mar 01, 2020 7:31 pm

If the n in DeltaG=-nFE is not explicitly given, how do we calculate its value?

Andrew Pfeiffer 2E
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

Re: delta G=-nFE

Postby Andrew Pfeiffer 2E » Sun Mar 01, 2020 7:36 pm

We can calculate it if we have all the other components of this equation (the standard change in Gibbs free energy, the energy, and Faraday's constant). Otherwise, we must use additional equations and knowledge about the conditions to indirectly solve for n and plug it back in.

Jasmine Vallarta 2L
Posts: 102
Joined: Sat Aug 17, 2019 12:18 am

Re: delta G=-nFE

Postby Jasmine Vallarta 2L » Sun Mar 01, 2020 7:56 pm

you can try to find the half rxns

Ritu Gaikwad 2E
Posts: 52
Joined: Thu Jul 11, 2019 12:16 am

Re: delta G=-nFE

Postby Ritu Gaikwad 2E » Sun Mar 01, 2020 7:56 pm

If the n is not given, look at the half reactions and find the number of moles of electrons transferred and that is your n value because that is what n stands for in the equation.

Shimei_2F
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: delta G=-nFE

Postby Shimei_2F » Sun Mar 01, 2020 7:59 pm

You can find it by balancing the electrons of the half-reactions and that's the n, the amount in moles of electrons that were transferred.

saigorijavolu2k
Posts: 108
Joined: Sat Sep 28, 2019 12:15 am

Re: delta G=-nFE

Postby saigorijavolu2k » Sun Mar 01, 2020 8:28 pm

You balance the half reactions and find out how many electrons are transferred.

Tahlia Mullins
Posts: 105
Joined: Thu Jul 25, 2019 12:15 am

Re: delta G=-nFE

Postby Tahlia Mullins » Sun Mar 01, 2020 8:32 pm

If n is not given, you can go through the process of balancing the half reactions for oxidation and reduction, eventually finding the number of moles of electrons being transferred!

AronCainBayot2K
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: delta G=-nFE

Postby AronCainBayot2K » Sun Mar 01, 2020 9:08 pm

You can calculate n whether by the other information given, such as Gibbs Free Energy, or using the half reactions to determine the amount of electrons.


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