Calculate the heat of combustion:

Question

1.C2H4(g)+3O2(g)===>2CO2(g)+2h20(L)

_____kJ/mol

2.2H2S(g)+3O2(g)===>2H2O(L)+2SO2(g)

_____kJ/mol

Answer 1

Look up delta H^o_f for CO2 and H2O (and multily each by 2).
delta H rxn = (sum products)-(sum reactants).

Answer 2

+9059.9