Be sure to answer all parts. comment on the feasibility of extracting copper from its ore chalcocite (cu2s) by heating. cu2s(s) → 2cu(s) +s(s) it is favored at low temperature. it is favored at high temperatures. it is never favored as written. calculate δg o for the overall reaction if this process is coupled to the conversion of sulfur to sulfur dioxide at 77°c. use the table with formation constants to calculate your answer. kj/mol species δh o f (kj/mol) δs o (j/mol·k) s(s) 0 32.1 cu(s) 0 33 cu2s(s) −79.5 120.9 o2(g) 0 205.2 so2(g) −296.8 248.2
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