Question

Co2 is a better reducing agent below 710k whereas co is abetter reducing agent above 710k how explain

Answer 1

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Answer 2

At a temperature below  710 k (673 k ), according to the Eliingham diagram the (CO,CO2) line lies below the (C,CO2) line. Therefore CO is a better reducing agent.

At a higher temperature, (C,CO) line lies below (CO,Co2 ) line and hence at higher temperature Carbon is a better reducing agent