Question

From the following bond energies:

H - H bond energy : 431.37 kJ mol^-1

C = C bond energy : 606.10 kJ mol^-1

C - C bond energy : 336.49 kJ mol^-1

C - H bond energy : 410.50 kJ mol ^-1

Enthalpy for the reaction.

will be

(a) - 243.6 kJ mol^-1

(b) -120.0 kJ mol^-1

(c) 553.0 kJ mol^-1

(d) 1523.6 kJ mol^-1

Answer 1

The correct option is: (b) -120.0 kJ mol^-1

Explanation:

For the given reaction, enthalpy of reaction can be calculated as