Nernst Equation


Moderators: Chem_Mod, Chem_Admin

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

Nernst Equation

Postby Kate_Santoso_4F » Thu Mar 14, 2019 9:16 am

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

Postby Jeannine 1I » Thu Mar 14, 2019 9:35 am

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

Postby Kavvya Gupta 1H » Thu Mar 14, 2019 11:37 am

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).


Return to “Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)”

Who is online

Users browsing this forum: No registered users and 1 guest