Question

The table below lists the average bond energies that you would need to determine reaction enthalpies.

Bond	Bond energy (kJ/mol)	Bond	Bond energy (kJ/mol)
C−C	347	C−H	414
H−H	436	C−O	360
N=N	418	N−H	389
N≡N	946	O−H	464
O=O	498	C=O	799*

* Bond energy in CO2.

Use bond energies to calculate the enthalpy of combustion of one mole of methanol in kJ per mole methanol.

Express your answer in kilojoules as an integer.

Use bond energies to calculate ΔHrxn for the following reaction:

N2(g)+3H2(g)→2NH3(g)

Express your answer in kilojoules as an integer.