Based on the given bond energies, the total change in bond energy for the reaction is -183 kJ and the reaction is exothermic.
What is the total change in bond energy for the reaction H2 + Cl2 -> 2HCI?
The total change in bond energy for the reaction is calculated as follows:
- total change in bond energy = sum of enegy of bonds broken - sum of energy of bonds formed
Sum of energy of bonds broken:
H-H bond energy = 432
Cl-Cl bond energy = 239
Sum = 671 joules.
Sum of energy of bonds formed
H-Cl bond energy = 427
Sum = 2 × 427 = 854
Total change in bond energy = 671 - 854
Total change in bond energy = -183 kJ
The reaction is exothermic since it has a negative total change in bond energ.
Therefore, the total change in bond energy for the reaction is -183 kJ and the reaction is exothermic.
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