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  • At temperatures above 1073K coke can be used to reduce FeO\; to \; Fe. How can you justify this reduction with the Ellingham diagram?

At temperatures above 1073K coke can be used to reduce FeO\; to \; Fe. How can you justify this reduction with the Ellingham diagram?

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As per Ellingham diagram at temperature greater than 1073 K, \Delta G^{0} for the formation FeO is less  negative than \Delta G^{0} for the formation of carbon monoxide from carbon.

Thus, above 1073 K, carbon can reduce FeO, i.e., \Delta_{r} G^{0} for the reaction 

FeO+C\overset{>1073}{\rightarrow}Fe+CO\; \text {is negative}

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