The standard reduction potential E° for half reactions areZn = Zn2+ + 2e– E° = +0.76 VFe = Fe2+ + 2e– E° = + 0.41 VThe EMF of the cell reaction Fe2+ + Zn = Zn2+ + Fe is

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The standard reduction potential E° for half reactions are

Zn = Zn²⁺ + 2e^– E° = +0.76 V

Fe = Fe²⁺ + 2e^– E° = + 0.41 V

The EMF of the cell reaction Fe²⁺ + Zn = Zn²⁺ + Fe is

– 0.35 V

+ 0.35

+ 1.17 V

– 1.17 V

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The rusting of iron takes place as follows

2H⁺ + 2e^– + $\dfrac{1}{2}$O₂ → H₂O(l); E° = +1.23 V

Fe²⁺ + 2e^– → Fe(s); E° = –0.44 V

Calculate ΔG° for the net process

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