Predict the enthalpy of reaction from the average bond enthalpies for the following reaction: 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g)

Bond
Enthalpy (kJ/mol)
H―H
436.4
H―O
460
C―H
414
C―C
347
C═C
620
C―O
351
O―O
142
O═O
498.7
C═O
745
C═O
(in carbon
dioxide)
799