Bond Energy Using the table calculate the overall energy change for this reaction.
1. How much energy is needed for bond breaking?
2. How much energy is needed for bond making?
3. What is the overall energy change? (overall energy change = reactants - products)#
4. Can you create an energy level diagram to represent this reaction?
H H
H-CEC-H
- H-C-C-H
11
+
2H-H
HH
Prom the table of the values of bond enthalpy, the values we need are:
Bond
Enthalpy (kJ/mol
H-H
432
Сас
239
CH
413
c-c
347