## E vs Eo

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

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Joined: Fri Sep 27, 2019 12:29 am

### E vs Eo

In the equation

Ecell = Eo - $\frac{RT}{nF}$ ln Q

what is the difference between Ecell and Eo?

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

### Re: E vs Eo

Eº is the standard cell potential which in this case refers to a cell under standard conditions (25ºC, 1atm, 1mol/L). E doesn't have these conditions, so you'd be calculating the cell potential for any differences in temperature or concentration, as the equation suggests.

Juliet Stephenson 4E
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Joined: Wed Sep 18, 2019 12:21 am

### Re: E vs Eo

E0 represents Ecell at standard conditions.

Posts: 50
Joined: Fri Sep 27, 2019 12:29 am

### Re: E vs Eo

Rory Simpson 2F wrote:Eº is the standard cell potential which in this case refers to a cell under standard conditions (25ºC, 1atm, 1mol/L). E doesn't have these conditions, so you'd be calculating the cell potential for any differences in temperature or concentration, as the equation suggests.

Ah thank you sm!

Nicholas Chin 1G
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Joined: Thu Jul 11, 2019 12:17 am

### Re: E vs Eo

In some cases, standard E will be zero, so this equation can be used to find Ecell in concentration cells.

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Joined: Fri Sep 27, 2019 12:29 am

### Re: E vs Eo

Nicholas Chin 1G wrote:In some cases, standard E will be zero, so this equation can be used to find Ecell in concentration cells.

Is Eo only ever 0 in a concentration cell or is there another situation in which Eo = 0 ?

ValerieChavarin 4F
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Joined: Wed Sep 18, 2019 12:18 am

### Re: E vs Eo

Eº refers to standard conditions while E is not and therefore is affected by changes such as temperature, concentration etc.

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