3. Calculate the standard enthalpy of reaction for the following reactions: A) 2 NH3(g) + 7/2 O2(g) → 2 NO2(g) + 3 H2O(g)

B) Fe2O3(s) + 3CO(g) → 2 Fe(s) + 3 CO2(g)

C) 2BaSO4(s) → 2BaO(s) + 2SO2(g) + O2 (g)

BASED ON THE ABOVE EQUATIONS - CALCULATE THE FOLLOWING:

(A)Calculate the heat required to combust 25.0 g of ammonia.

(B) Calculate the heat required to produce 25.0 g of iron from iron(III) oxide.

(C) Calculate the heat required to decompose 10.0 g of barium sulfate. Δ Hfo (BaO) = -553.5 kJ/mol