We are asked to calculate the mass of CO2 produced per kJ of heat emitted.
Note that we need to multiply each ΔH˚f by the stoichiometric coefficient since ΔH˚f is in kJ/mol.
Also, note that ΔH˚f for elements in their standard state is 0.
C2H5OH(g) + 6 O2(g)→ 4 CO2(g) + 4 H2O(g)
Molar mass CO2 = 44.01 g/mol
Ethanol (C2H5OH) is currently blended with gasoline as an automobile fuel.
Calculate the mass of CO2 produced per kJ of heat emitted.