## Nernst Equation

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

Kate_Santoso_4F
Posts: 72
Joined: Fri Sep 28, 2018 12:29 am

### Nernst Equation

There are two forms of the Nernst Equation given on the constants and formulas sheet. One is E(reaction) = E(standard) - (RT/nF)*lnQ and the other is E(reaction) = E(standard) - (0.05916V/n)*logQ. Can someone please explain what the difference is between these two forms of the equation and when you would use one over the other?

Jeannine 1I
Posts: 73
Joined: Fri Sep 28, 2018 12:27 am

### Re: Nernst Equation

I believe they will both give you similar answers, the second equation with a number in it is just the simplified version, where the (RT/F) is already calculated, given that the reaction is at the standard temperature 298 K.

Can anyone confirm this?

Kavvya Gupta 1H
Posts: 35
Joined: Fri Sep 28, 2018 12:21 am

### Re: Nernst Equation

The first equation is written is for any E reaction value at any temperature. The second one is specific to room temperature (25 degrees Celcius).

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