statements about E cell and E¤ cell


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kshalbi
Posts: 68
Joined: Fri Sep 25, 2015 3:00 am

statements about E cell and E¤ cell

Postby kshalbi » Thu Feb 04, 2016 3:43 pm

Why doesnt E¤ cell decrease as the cell rxn progresses? Also, the solutions manual says that E¤ can be calculated from K, but E cell cannot. The equation for Ecell is Ecell=E¤cell-(RT/nF) lnQ. If E¤cell can be calculated with K and Ecell is dependant on E¤, why cant E cell be found from K? Does it have to do with the extra lnQ?

Vonny Chong
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: statements about E cell and E¤ cell

Postby Vonny Chong » Thu Feb 04, 2016 3:51 pm

E¤ doesn't change because it is an intensive property so it doesn't not depend on how much material there is. I think what the solutions manual means is that E cell cannot be calculated from K without knowing the value of E¤ first.


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