The equilibrium constant, k, for a redox reaction at 25° c is 7.3 * 107. what is the value of e° if the overall reaction transfers 2 electrons? the equilibrium constant, k, for a redox reaction at 25° c is 7.3 * 107. what is the value of e° if the overall reaction transfers 2 electrons? 0.23 v 0.47 v 0.16 v 0.86 v

Question

Boyer

Chemistry

5 March, 20:07

The equilibrium constant, k, for a redox reaction at 25° c is 7.3 * 107. what is the value of e° if the overall reaction transfers 2 electrons? the equilibrium constant, k, for a redox reaction at 25° c is 7.3 * 107. what is the value of e° if the overall reaction transfers 2 electrons? 0.23 v 0.47 v 0.16 v 0.86 v

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Nick · Answer 1

0.23 V.

Explanation:

∵ ΔG° = - RT lnK.

∴ ΔG° = - RTlnK = - (8.314 J/mol) (298 K) ln (7.3 * 10⁷) = - 44.86 x 10³ J/mol.

∵ ΔG° = - nFE°

∴ E° = - ΔG°/nF = - ( - 44.86 x 10³ J/mol) / (2 x 96500 s. A/mol) = 0.2324 V ≅ 0.23 V.