At temperature above `1073K` coke can be used to reduce `FeO` to `Fe`. How can you justify this reduction with Ellingham diagram?

Explanation

At temperatures above 1073 K, ` Delta _ f G^(@) ` (C, CO) curve lies below ` Delta _ f G^(@)(Fe, FeO ) ` curve , i.e., ` Delta _ f G ^(@) (C, CO ) lt Delta _fG^(@)(Fe, FeO ) `, therefore, coke can reduce FeO to Fe.