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What is the relationship between Gibbs free energy of the cell reaction in a galvanic cell and the emf of the cell? When will the maximum work be obtained from a galvanic cell?

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The required relationship between Gibbs free energy and the emf in a galvanic cell is \Delta G=-nFE

The maximum work will be obtained from a galvanic cell W_{max}=nFE^{0} where,

E=cell potential

E^{0} = Standard emf of the cell

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