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Relationship Between Ecell and K

Posted: Tue Mar 03, 2020 10:50 pm
by zfinn
what's the relationship between Ecell and the value of K? (i.e. if K > 1 or K <1)

Re: Relationship Between Ecell and K

Posted: Tue Mar 03, 2020 11:32 pm
by Max Madrzyk Dis 4G
I think the higher the value of K, the higher the value of Ecell.

Re: Relationship Between Ecell and K

Posted: Mon Mar 09, 2020 1:46 pm
by Justin Quan 4I
If E˚ is positive, then K>1; if E˚ is negative, then K<1. This will always hold true. It may also be important to note that whenever E˚ is positive, then ∆G˚ is negative, and vise versa.

Re: Relationship Between Ecell and K

Posted: Mon Mar 09, 2020 1:48 pm
by Alfred Barrion 2H
When Ecell > 0, then K>1.
When Ecell < 0, then K<1

Re: Relationship Between Ecell and K

Posted: Mon Mar 09, 2020 2:08 pm
by Kallista McCarty 1C
K is greater than 1 if Ecell is greater than 0. K is less than 1 if Ecell is less than 0

Re: Relationship Between Ecell and K

Posted: Wed Mar 11, 2020 10:44 am
by Jessica Chen 2C
I agree with all the previous responses, and it makes sense if you think about the meaning of these values. Ecell can describe spontaneity (spontaneous if the value is positive, not spontaneous if the value is negative) while K, the equilibrium constant, describes whether the reaction is product or reactant favored. We can see that spontaneous reactions will have more product (Ecell>0 and K>1) while nonspontaneous reactions will have more reactants (Ecell<0 and K<1).

Re: Relationship Between Ecell and K

Posted: Wed Mar 11, 2020 4:59 pm
by Julia Holsinger_1A
Ecell and K are positively related so the larger the K means a more positive Ecell

Re: Relationship Between Ecell and K

Posted: Wed Mar 11, 2020 5:09 pm
by Pegah Nasseri 1K
Looking at the two equations E˚= (RT/nF)lnK and Ecell = E˚- (RT/nF)lnQ, you can see that if K>1 then E˚> 0. When E˚>0, then Ecell will be a greater value and will most likely be greater than zero as well. So if K>0 then E˚>0 and Ecell>0.

Re: Relationship Between Ecell and K

Posted: Wed Mar 11, 2020 10:36 pm
by Bryan Chen 1H
I remember my TA writing Ecell>0 than K>0 and vice versa, and you can prove this from the equations

Re: Relationship Between Ecell and K

Posted: Thu Mar 12, 2020 2:08 pm
by Celine 1F
Ecell and K are positively related