Sometimes n represents the number of electrons in the half reaction, but other times it is the change in the moles throughout the reaction. Could it be either or is it really just one? If you are not told to find the half reactions of the redox equation, do you have to find them anyway to find n if the question is asking for the Gibbs Free Energy?
Lmk. Thanks.
What is n? [ENDORSED]
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 21
- Joined: Fri Jul 15, 2016 3:00 am
Re: What is n?
Using the equation: W(max)=ΔG=-nFE, n represents the total number of moles transferred.
-
- Posts: 17
- Joined: Fri Jul 22, 2016 3:00 am
-
- Posts: 20
- Joined: Wed Sep 21, 2016 2:57 pm
- Been upvoted: 1 time
Re: What is n? [ENDORSED]
For that equation specifically "n" refers to the moles of electrons being transferred in the balanced redox reaction. So yes you will need to know that balanced value if asked for the Gibbs Free energy, which requires balancing the redox equation.
-
- Posts: 10
- Joined: Wed Sep 21, 2016 2:55 pm
Re: What is n?
n refers to the numbers of moles and it is important to plug it in when doing the math problems.
-
- Posts: 23
- Joined: Fri Jul 22, 2016 3:00 am
Re: What is n?
If you're just looking to calculate and solve that equation, an easy way to think of it would be the number of electrons transferred in the redox reaction. That value would be n.
-
- Posts: 10
- Joined: Tue Oct 04, 2016 3:01 am
-
- Posts: 10
- Joined: Wed Sep 21, 2016 2:55 pm
Re: What is n?
n will always be number of moles (of molecules, or in this case, e-). I think that it should be assumed that the value of n should be the number of electrons in the balanced equation, which could sometimes also be the same number in the half reaction.
-
- Posts: 55
- Joined: Wed Sep 21, 2016 2:57 pm
Re: What is n?
n represents the number of moles of electrons transferred, and that number can be found by looking at the balanced half reactions. The coefficient in front of the e- is the value used for n.
Return to “Work, Gibbs Free Energy, Cell (Redox) Potentials”
Who is online
Users browsing this forum: No registered users and 6 guests