For the combustion reaction of ethylene (C₂H₄)
C₂H₄+ 3O₂ → 2CO₂+ 2H₂O assume all reactants and products are gases, and calculate the ∆h⁰ rxn using bond energies.
1. 0 kj/mol
2. 251 kj/mol
3. 680 kj/mol
4. −1300 kj/mol
5. −251 kj/mol
6. 1300 kj/mol
7. −680 kj/mol