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The rusting of iron takes place as 2H^++...

The rusting of iron takes place as `2H^++2e+1/2O_2rarrH_2O(l),E^@=+1.23V`
`Fe^(2+)+2e rarrFe(s),E^@=-0.44V` Thus, `DeltaG^@` for the net process is

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