### E cell

Posted:

**Wed Mar 06, 2019 9:20 am**What is the difference between E cell and E^o ?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=142&t=43690

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Posted: **Wed Mar 06, 2019 9:20 am**

What is the difference between E cell and E^o ?

Posted: **Wed Mar 06, 2019 10:12 am**

E^o is the standard reduction potential. It is the reduction potential calculated at a 1 M solution or at 1 atm and at 25 degrees Celsius.

E is the cell potential, and it can change based on concentrations of product/reactant, temperature, and other nonstandard conditions.

The equation that relates these values is the Nernst equation, which is E = E^o - (RT/nF)lnQ

E is the cell potential, and it can change based on concentrations of product/reactant, temperature, and other nonstandard conditions.

The equation that relates these values is the Nernst equation, which is E = E^o - (RT/nF)lnQ

Posted: **Wed Mar 06, 2019 4:49 pm**

E^o is the standard reduction potential, which is essentially the cell potential at STP under ideal conditions.

E is the cell potential that changes based on the "nonstandard" conditions.

E is the cell potential that changes based on the "nonstandard" conditions.

Posted: **Thu Mar 07, 2019 12:19 am**

E^o is the standard reduction potential, which means under standard conditions: 1atm, 1M, and at 25 degrees Celsius

E is the cell potential, which changes.

E is the cell potential, which changes.

Posted: **Thu Mar 07, 2019 9:46 am**

E^o is the standard reduction potential, or basically how badly the molecule wants to be reduced (positive means it wants to be reduced more, negative means it wants to be oxidized more). Ecell basically refers to the total standard reduction potential of the cell with E^o of the cathode - E^o of the anode

Posted: **Thu Mar 07, 2019 11:39 am**

E^o cell is used when under standard conditions. E cell is under "nonstandard" conditions.