Calculate ΔG° for the reaction of iron(II) ions with one mole of permanganate ions. MnO₄⁻(aq) + 8H⁺(aq) + 5e⁻ ⇄ Mn²⁺(aq) + 4H₂O(l) E° = 1.51 V
Fe³⁺(aq) + e⁻ ⇄ Fe²⁺(aq) E°= 0.77 V

Question

Quizplus · Accepted Answer

The standard cell potential (E°cell) is calculated by subtracting the reduction potential of Fe3+/Fe2+ from that of MnO4−/Mn2+. E°cell = 1.51 V - 0.77 V = 0.74 V. The number of electrons transferred (n) is 5. ΔG° = -nFE°cell = -5 * 96485 C/mol * 0.74 V = -357 kJ/mol.

Calculate ΔG° for the Reaction of Iron(II) Ions with One