Question 239126

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????????????(????) + 3????2(????) → 2????????????(????) + 2????????2(????) ∆???? = −879 ???????? ????????????

Calculate the heat evolved (in kJ) per gram of ZnS roasted