how to calculate the heat evolved (in kJ) per gram of ZnS roasted
The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting, that is, the conversion of ZnS to ZnO by heating.
2 ZnS (s) + 3 O2 (g) --> 2 ZnO (s) + 2 SO2 (g) delta H = -879 kJ/mol
Calculate the heat evolved (in kJ) per gram of ZnS roasted.
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