The Ecello for the reaction 2Fe3++Fe→3Fe2+ is 1.21 V at 298 K ΔG° of this process is

2Fe3++Fe→3Fe2+ (e−+Fe3+→Fe2+)2, Fe→Fe2++2e− ∴n=2 ΔGo=−nFEo=−2×96500×1.21 = - 233.53 kJ.

The Ecello for the reaction 2Fe3++Fe→3Fe2+ is 1.21 V at 298 K ΔG° of this process is

2Fe3++Fe→3Fe2+ (e−+Fe3+→Fe2+)2, Fe→Fe2++2e− ∴n=2 ΔGo=−nFEo=−2×96500×1.21 = - 233.53 kJ.

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The $E_{c e l l}^{o}$ for the reaction $2 F e^{3 +} + F e \to 3 F e^{2 +}$ is 1.21 V at 298 K $Δ G °$ of this process is

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-350.29 kJ

-116.76 kJ

-175.14 kJ

-233.53 kJ

answer is D.

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Detailed Solution

$2 F e^{3 +} + F e \to 3 F e^{2 +}$

$(e^{-} + F e^{3 +} \to F e^{2 +}) 2,$

$F e \to F e^{2 +} + 2 e^{-}$

$∴ n = 2$

$Δ G^{o} = - n F E^{o} = - 2 \times 96500 \times 1.21$

= - 233.53 kJ.

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The Ecello for the reaction 2Fe3++Fe→3Fe2+ is 1.21 V at 298 K ΔG° of this process is

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The $E_{c e l l}^{o}$ for the reaction $2 F e^{3 +} + F e \to 3 F e^{2 +}$ is 1.21 V at 298 K $Δ G °$ of this process is