free energy and cell potential and work relationships


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Angelina Tran 2F
Posts: 85
Joined: Fri Sep 29, 2023 10:58 am

free energy and cell potential and work relationships

Postby Angelina Tran 2F » Sun Mar 17, 2024 9:24 pm

hii im still confused on the relationships between the formulas of free energy and cell potential and work, can someone explain?

Craig_Choi_2A
Posts: 41
Joined: Wed Jan 11, 2023 8:20 am

Re: free energy and cell potential and work relationships

Postby Craig_Choi_2A » Sun Mar 17, 2024 9:28 pm

Delta G > 0 implies instability. Delta G < 0 implies stability. Cell potential < 0 means there is thermodynamic tendency to reduce hydrogen. Cell potential > 0 means there is a thermodynamic to be reduced by hydrogen.

Maegan Abutin 2C
Posts: 78
Joined: Fri Sep 29, 2023 10:44 am

Re: free energy and cell potential and work relationships

Postby Maegan Abutin 2C » Sun Mar 17, 2024 9:30 pm

Hi!

Free energy change (△G) determines the spontaneity of reactions. Cell potential is related to △G as demonstrated by the equation of △G = -nFEcell. The sign of a Ecell shows whether a reaction is spontaneous or non spontaneous. Work done by an electrochemical cell is given by w = -nFEcell(q), the sign of Ecell and q provides information on the direction of work.


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