Name__________________________________ WS Enthalpy (Bond Energies) The complete combustion of propane can be represented by the following equation: or we could redraw it to represent the bonds present: #1 #2 #3 #4 CH4(g) + 4Cl2(g) -----> CCl4(g) + 4HCl(g) 2NH3 N2 + 3H2