How to determine n in the Nernst Equation/Gibbs Free Energy Equation


Moderators: Chem_Mod, Chem_Admin

Baoying Li 1B
Posts: 113
Joined: Sat Aug 17, 2019 12:18 am

How to determine n in the Nernst Equation/Gibbs Free Energy Equation

Postby Baoying Li 1B » Fri Feb 21, 2020 9:18 pm

What is "n" in the Nernst Equation and Gibbs Free Energy Equation? Do they have the same meaning? How do we determine it when we are giving a chemical equation? For Hw PROBLEM 6L#1 a), how do we know that the n is 2?

Chris Tai 1B
Posts: 102
Joined: Sat Aug 24, 2019 12:16 am

Re: How to determine n in the Nernst Equation/Gibbs Free Energy Equation

Postby Chris Tai 1B » Fri Feb 21, 2020 9:28 pm

The "n" in the Nernst equation represents the amount of moles of electrons that are present. When this is multiplied by Farraday's constant, one can find the total charge of that given amount of moles of electrons.
The n in the Gibbs Free Energy represents the amount of moles of a given substance, it doesn't necessarily have to be moles of electrons.
We can determine the amount of moles n in a chemical equation by looking at the stoichiometric coefficients of the chemical equation once we have balanced it, or we can use the given amount of moles of a substance that the problem provides.


Return to “Work, Gibbs Free Energy, Cell (Redox) Potentials”

Who is online

Users browsing this forum: No registered users and 1 guest