State Function?

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804302066
Posts: 19
Joined: Sat Nov 23, 2013 3:00 am

State Function?

Postby 804302066 » Mon Mar 10, 2014 10:17 pm

Why is E (cell potential) not a state function?

irisc23
Posts: 237
Joined: Sat Nov 23, 2013 3:00 am

Re: State Function?

Postby irisc23 » Mon Mar 10, 2014 10:22 pm

Cell potential is not a state function. I cannot add two of the same reaction and get double the cell potential (i.e. if I have F2 + 2e- --> 2F- and add it to F2 + 2e- --> 2F-, the potential remains the same). This violates the definition of a state function.

However, n*E IS a state function as it represents the Gibbs free energy (divided by Faraday's constant). This quantity is the cell potential multiplied by the number of electrons transferred per reaction.


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