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Question

The standard reaction Gibbs energy for the electrochemical reaction,

Cr2O27+2Fe+14H+2Cr3++2Fe3++2H2O, is 793 kJ mol1. The standard cell potential is Volts.


Solution

ΔG=nFEcell

Here n=6,

793×103=6×96500×Ecell

Ecell=+1.3696

1.37V


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