Example 14.3 moles confusion? (Not HW question, example.)

Moderators: Chem_Mod, Chem_Admin

Josiah Chung 1G
Posts: 16
Joined: Fri Sep 25, 2015 3:00 am

Example 14.3 moles confusion? (Not HW question, example.)

Postby Josiah Chung 1G » Sun Jan 31, 2016 5:28 pm

In example 14.3 the question states:

"The potential of the Daniell cell for the solutions of 1.00mol/L copper and zinc ions is +1.04V/ What is the reaction Gibbs free energy for this cell?"

When the problem is set up they use the equation G = -nF(Ecell). E is 1.04, and F is the constant, but why does the example plug in a 2 for the value of moles to solve for the Gibbs free energy?

KVu 3G
Posts: 12
Joined: Fri Sep 25, 2015 3:00 am

Re: Example 14.3 moles confusion? (Not HW question, example.

Postby KVu 3G » Sun Jan 31, 2016 10:03 pm

n is the number of moles of electrons transferred. When the redox reaction between zinc and copper are balanced there are 2 moles of electrons transferred.




Return to “Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams”

Who is online

Users browsing this forum: Leo Naylor 2F, Steph Du 1H and 1 guest