Gibbs Free Energy connects together Standard Cell Potential and the Equilibrium Constant
Concept #1: Through Gibbs Free Energy a new formula can be derived to connect the Standard Cell Potential and the Equilibrium Constant.
Example #1: A certain electrochemical reaction involves the transferring of 4 electrons. If the value of its equilibrium constant is 2.50 x 1012 at 25.0ºC, calculate the standard cell potential.
Practice: Calculate the equilibrium constant for the following reaction at 25ºC.
Fe (s) + I2 (s) → Fe2+ (aq) + 2 I – (aq)
Given the following reduction potentials:
Fe2+(aq) + 2 e– →. Fe (s) E°red = – 0.45 V
I2 (s) + 2 e– →. 2 I – (aq) E°red = + 0.54 V
