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  • From the Ellingham graph between Gibb's energy and temperature, out of C and CO, which is a better reducing agent for ZnO? <img alt="" src="https://cdn.entrance360.com/media/uploads/2

From the Ellingham graph between Gibb's energy and temperature, out of C and CO, which is a better reducing agent for ZnO?

Option: 1

Carbon


Option: 2

CO


Option: 3

Both (1) and (2) only


Option: 4

None of the above


Answers (1)

best_answer

C is a better reducing agent than CO for the reduction of ZnO because the Gibbs energy of formation for \mathrm{CO_{2}} from C is smaller than that of ZnO above 1273 K which makes the reduction of ZnO by C feasible. But the Gibbs energy of formation of \mathrm{CO_{2}} from CO is greater than that of ZnO and thus, CO cannot reduce ZnO.

Posted by

SANGALDEEP SINGH

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