Nernst Equation

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

Lizette Noriega 1H
Posts: 105
Joined: Wed Sep 18, 2019 12:15 am

Nernst Equation

I've seen the different versions of the Nernst equation but when do we know whether to apply one of the other?

Letty Liu 2C
Posts: 105
Joined: Fri Aug 09, 2019 12:16 am

Re: Nernst Equation

I think it depends on what information you're given, so what you're working with. I believe there is only two versions of the Nernst equation though: one with lnQ and one with logQ.

Lizette Noriega 1H
Posts: 105
Joined: Wed Sep 18, 2019 12:15 am

Re: Nernst Equation

Letty Liu 2C wrote:I think it depends on what information you're given, so what you're working with. I believe there is only two versions of the Nernst equation though: one with lnQ and one with logQ.

Got it! But when do we use lnQ rather than logQ and vice versa?

Wendy 1E
Posts: 111
Joined: Sat Aug 17, 2019 12:17 am
Been upvoted: 2 times

Re: Nernst Equation

It doesn't really matter whether you use the ln Q or log Q equation. Some people prefer the log Q equation because on the equations sheet, you are given 0.05916V/n and you do not have to calculate R*T/nF, which you have to calculate with the ln Q equation.

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