Figure 10.3
Using bond energies to calculate DHorxn of methane combustion
Enthalpy,H
BOND BREAKAGE
4 BE(C-H) = +1652 kJ
2 BE(O2) = + 996 kJ
DHo (bond-breaking) = +2648 kJ
BOND FORMATION
4 [-BE(O-H)] = -1868 kJ
DHo (bond forming) = -3466 kJ
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