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Q.

The half cell reactions for the corrosion are, 2H++12O2+2eH2O;E0=1.23V and Fe2++2eFe(s);E0=0.44V. Find the G0 (in kJ) for the overall reaction

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a

-76 K

b

-161 kJ

c

-152 kJ

d

-322 kJ

answer is B.

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Detailed Solution

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Ecell 0=Ehigh SRP 0Elow SRP 0=[1.23(0.44)]=1.67VΔG=2×96500×1.67=322.3KJ

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