DefinePK

Description

The standard potential, E°, for a redox reaction is related to the standard change in free energy, ΔG°, for the reaction by the equation ΔG° = -nFE°. When E° is positive, ΔG° is negative, and the reaction is thermodynamically favored. When E° is negative, ΔG° is positive, and the reaction is thermodynamically unfavored. It is also possible to relate E° to the equilibrium constant, K, for the reaction through the relationship between ΔG° and K (ΔG° = -RTlnK). View more lessons or practice this subject at https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:applications-of-thermodynamics/x2eef969c74e0d802:cell-potential-and-free-energy/v/standard-potential-free-energy-and-the-equilibrium-constant

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