what is Nerst equation?
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In electrochemistry, the Nernst equation is an equation that relates the reduction potential of an electrochemical reaction (half-cell or full cell reaction) to the standard electrode potential, temperature, and activities (often approximated by concentrations) of the chemical species undergoing reduction and oxidation ...
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Nernst equation is a general equation that relates the Gibbs free energy and cell potential in electrochemistry. It is very helpful in determining cell potential, equilibrium constant etc. It takes into account the values of standard electrode potentials, temperature, activity and the reaction quotient for the calculation of cell potential. For any cell reaction, Gibbs free energy can be related to standard electrode potential as:
ΔG =-nFE
Where,
ΔG= Gibbs free energy,
n = number of electrons transferred in the reaction,
F = Faradays constant (96,500 C/mol)
E= cell potential
Under standard conditions, the above equation can be given as,
ΔGo =-nFEo
ΔG =-nFE
Where,
ΔG= Gibbs free energy,
n = number of electrons transferred in the reaction,
F = Faradays constant (96,500 C/mol)
E= cell potential
Under standard conditions, the above equation can be given as,
ΔGo =-nFEo
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