Using the аverаge bоnd energies prоvided, estimаte ΔHrxn fоr the combustion of methane. CH4+2O2→CO2+2H2O Bond BDE (kJ/mol) C–H 413 O=O 498 C=O in CO₂ 532 O–H 497 Hint: Even if you don't have absolute confidence in how the bonds are configured, the table provided above can be used to confirm the lewis dot structure (should you need it).