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Extraction of copper directly from sulphide ore is less favourable than from its oxide through reduction. Explain.

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asked Dec 18, 2017 in Chemistry by sforrest072 (157,439 points) ● 63 ● 448 ● 1279
edited Dec 18, 2017 by sforrest072

Extraction of copper directly from sulphide ore is less favourable than from its oxide through reduction. Explain.

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answered Dec 18, 2017 by mdsamim (213,225 points) ● 5 ● 10 ● 22
selected Dec 18, 2017 by sforrest072
 
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2CuS (s) + C (s) => CS2 (l) + 2Cu (s)
CuO (s) + C (s) => CO (g) + Cu (s)

G value is more –ve in second case as compared with first case.

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