Question

When heated, azomethane decomposes into nitrogen gas and ethane gas.
CH3N=NCH3(g) N2(g) + C2H6(g)
Bond Bond Enthalpy (kJ/molrxn) Bond Bond Enthalpy (kJ/molrxn)
C-H 413 N-N 163
C-N 305 N=N 418
C-C 346 NN 945
Using average bond energies, calculate the enthalpy of reaction.
A.-611 kJ
B.-527 kJ
C.-429 kJ
D.-313 kJ
E.-263 kJ

Answer

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