Can someone explain how to do this? Consider the following equation: 2ZnS(s) + 3O2(g) ---> 2ZnO(s) + 2SO2(g), ΔH° = –878.2 kJ. How much heat is released when 3.0 mol ZnS(s) reacts in excess oxygen?
as per the equation 2 moles of ZnS produces -872.8kJ of energy on reaction with Oxygen.
3 moles of ZnS will produce = -436 kJ x 3 = -1308 kJ of energy.
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