Relationship Between Ecell and K

[zfinn]

what's the relationship between Ecell and the value of K? (i.e. if K > 1 or K <1)

[Max Madrzyk Dis 4G]

I think the higher the value of K, the higher the value of Ecell.

[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.

[Alfred Barrion 2H]

When Ecell > 0, then K>1.
When Ecell < 0, then K<1

[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

[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).

[Julia Holsinger_1A]

Ecell and K are positively related so the larger the K means a more positive Ecell

[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.

[Bryan Chen 1H]

I remember my TA writing Ecell>0 than K>0 and vice versa, and you can prove this from the equations

[Celine 1F]

Ecell and K are positively related