Using the average bond energies given below, estimate the enthalpy of combustion of one mole of propyne (C3H4).
Hint: First determine the Lewis structure of propyne and write a balanced equation for its combustion.
Bond | Energy (kJ/mol)
C–C | 347
C=C | 614
C≡C | 839
C–H | 413
O–O | 204
O=O | 498
O–H | 467
C=O (in CO2) | 799
(a) –2,057 kJ/mol
(b) –1,832 kJ/mol
(c) –1,790 kJ/mol
(d) 804 kJ/mol
(e) 2,057 kJ/mol