What is E?


Moderators: Chem_Mod, Chem_Admin

Kathryn 1F
Posts: 66
Joined: Fri Sep 28, 2018 12:19 am

What is E?

Postby Kathryn 1F » Sun Feb 24, 2019 9:31 pm

What is E (and E(nought))? In my notes I have E(nought) meaning "Standard Reaction Potential"--but I don't understand what that means, conceptually. Also, what is it used for in a battery?

Joon Chang 2F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: What is E?

Postby Joon Chang 2F » Sun Feb 24, 2019 10:27 pm

E is electromotive force or the potential difference in charge between two points. E(nought) is E under standard conditions (all solutes present at 1 molL^-1 and all gases at 1 bar). It can also be thought of as the measure of the electron-pulling power of a single electrode.

yuetao4k
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 1 time

Re: What is E?

Postby yuetao4k » Sun Feb 24, 2019 10:48 pm

The nought symbol indicates standard conditions.

AnnaYan_1l
Posts: 96
Joined: Fri Apr 06, 2018 11:05 am
Been upvoted: 1 time

Re: What is E?

Postby AnnaYan_1l » Mon Feb 25, 2019 12:14 am

I think another property of standard conditions is 25 degrees C

Jack DeLeon 1B
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

Re: What is E?

Postby Jack DeLeon 1B » Mon Feb 25, 2019 12:20 am

the standard reaction potentials of say a copper zinc (Cu/Zn) battery can be used to find the voltage of the battery. given the standard reaction potentials of the components of the redox reaction, you would add and subtract based on whether they are products or reactants to find the voltage. A positive value indicated a spontaneous reaction


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

Who is online

Users browsing this forum: No registered users and 2 guests