CHEMISTRY · Single correct · AP · Chemistry · Thermochemistry · Thermochemistry
Problem
Using the average bond energies in the table, determine which of the following combustion reactions releases the greatest amount of energy per mole of fuel burned at 298K.
Average bond energies (kJ mol−1): C–H 413, C–C 347, C=C 614, C≡C 839, O=O 498, C=O (in CO2) 799, O–H 463
(a) combustion of CH4
(b) combustion of C2H2
(c) combustion of C2H4
(d) all approximately equal