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An amount of 414.27 g of zinc sulfide (ZnS, MM=97.44 g/mol) reacts with 99.58 g of oxygen gas (O2, MM=31.999 g/mol) at a constant temperature of 298.0 K and constant pressure of 1.00 atm. The reaction:

2 ZnS(s) + 3 O2(g) --> 2 ZnO(s) + 2 SO2(g)
dH = -818.58 kJ

a) How much heat is released by the reaction?

b) How much work is done by the atmosphere on the reacting mixture for the conditions stated above?

Please help. Thank you so much!

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