What amount of carbon dioxide is produced per kJ of heat produced in burning ethene, C2H4?

Answer 1

The burning of a hydrocarbon will yield carbon dioxide and water.

C₂H₄ + 3 O₂ --> 2 CO₂ + 2 H₂O

From the balanced equation, 1 mol of C₂H₄ will produce 2 mol of CO₂. I'm not sure what to do besides looking up ΔH for the reaction.

Answer 2

Either look up the heat combustion of ethene or go to the delta Hformation stables and look up CO2, H2O, and ethene. Then dHrxn = (n*dHformation products) - (n*dHformation reactants)