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The chemical reaction that causes iron to corrode in air is given by 4Fe+3O2→2Fe2O3 in which...

The chemical reaction that causes iron to corrode in air is given by

4Fe+3O2→2Fe2O3

in which at 298 K

ΔH∘rxn = −1684 kJ
ΔS∘rxn = −543.7 J/K

Gibbs free energy (G) is a measure of the spontaneity of a chemical reaction. It is the chemical potential for a reaction, and is minimized at equilibrium. It is defined as G=H−TS where H is enthalpy, T is temperature, and S is entropy.

Part A

What is the standard Gibbs free energy for this reaction? Assume the commonly used standard reference temperature of 298 K.

Part B

What is the Gibbs free energy for this reaction at 3652 K ? Assume that ΔH and ΔS do not change with temperature.

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