81. Using the data shown as follows to calculate ΔG° for the reaction (1 F = 96,485 coulombs):

2Fe³⁺(aq) + Cu(s) → 2Fe²⁺(aq) + Cu²⁺(aq)

The reduction potentials for Fe3+ and Cu2+ are as follows:

 Fe³⁺ + e^– → Fe²⁺    ε° = 0.77 V 

Cu²⁺ + 2e^– → Cu      ε° = 0.34 V 

(A) –8.3 × 10⁴ J
(B) –1.2 × 10⁵ J
(C) –4.2 × 10⁴ J
(D) –6.0 × 10⁴ J
(E) –2.4 × 10⁵ J

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