For the reaction 2 Fe ^ 3+ (aq) + 2 I ^ - (aq) 2 Fe ^ 2+ (aq) + I _2(aq)…

CHEMISTRY · Subjective · A Level · Chemistry · Electrode potentials · Electrode potentials

Problem

For the reaction 2Fe3+(aq)+2I−(aq)→2Fe2+(aq)+I2(aq)2\text{Fe}^{3+}(aq) + 2\text{I}^{-}(aq) \rightarrow 2\text{Fe}^{2+}(aq) + \text{I}_2(aq) thermochemical data give ΔH∘=+12 kJ\Delta H^{\circ} = +12\,\text{kJ} and the equilibrium constant K=4.6×108K = 4.6 \times 10^{8}. The standard cell potential is measured as +0.70 V+0.70\,\text{V}. Based solely on the sign of the standard cell potential, predict whether the reaction is thermodynamically favorable under standard conditions and state your reasoning briefly.

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