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  • Which among the following is better reducing agent at 673 K? <div

Which among the following is better reducing agent at 673 K?

Option: 1

Coke


Option: 2

Cu


Option: 3

Fe 


Option: 4

CO


Answers (1)

best_answer

Ellingham diagram represents a graph between the change in free energy (ΔG) and temperature. This diagram provides basis for considering the choice of reducing agent in reduction of oxides.

At 673 K , the line for \mathrm{\Delta G} vs T of \mathrm{CO-CO_{2}} lies lower than the \mathrm{\mathrm{C}-\mathrm{CO} \text { or } \mathrm{C}-\mathrm{CO}_2 \text { or } \mathrm{Cu}-\mathrm{Cu}_2 \mathrm{O}\; or \; Fe-FeO} line 

Any metal will reduce the oxide of other metal which lie above it in Ellingham diagram.
Hence, CO acts as better reducing agent.

Posted by

manish

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