The relationship between ΔG and Ecell is:
Fe3+(aq) + 3 e- → Al(s) E°cell = – 0.04 V cathode
Sn2+(aq) + 2 e- → Pb(s) E°cell = – 0.14 V anode
E°cell = 0.1 V
Use tabulated half-cell potentials to calculate ΔG°rxn for each of the following reactions at 25 °C.
2Fe3+(aq) + 3Sn(s) → 2Fe(s) + 3Sn2+(aq)
Express the energy change in kilojoules to two significant figures.
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