- When the cell reaction is at equilibrium, the reaction quotient Q is equal to the equilibrium constant; Q=K
- cell at equilibrium can not do work
- Potential difference, E=0
The equilibrium constant, K, for the cell is derived using a derivative of the Nernst equation:
ln K = nFE0/RT
where F is the Faraday constant,
R is the gas constant,
T is the temperature in kelvins.
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