Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
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Answered by
52
The Gibbs free energy of formation (ΔfG) of CS2 and H2S are more than Cu2S.
Therefore, the C and H2 cannot produce the Cu from the Cu2S.
The Gibbs free energy of formation (ΔfG) of Cu2O is more than CO.
As a result, C can produce Cu from Cu2O. C(s) +Cu2O(s) → 2Cu(s) + CO(g).
Therefore,the extraction of the copper from the copper pyrite ore is more difficult than from the oxide ore by reduction.
Answered by
29
the Gibbs free energy of formation of Cu2O is greater than that of CO. Hence, C can reduce Cu2O to Cu. Hence, the extraction of copper from its pyrite ore is difficult than from its oxide ore through reduction.
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