Use the information in the table to answer the question.
Bond Bond Energy (kJ/mol)
H–Cl 427
Cl–Cl 242
H–H 435
Hydrogen and chlorine gases react to produce hydrochloric acid according to the reaction.
H2 + Cl2 → 2HCl
How much total bond energy, in kJ/mol, is in the products of the reaction?
The total bond energy in the products of the reaction can be calculated by multiplying the number of bonds formed by the bond energy of each bond.
In the reaction, 2 H–Cl bonds are formed, so we multiply the bond energy of H–Cl bond by 2:
2 H–Cl bonds x 427 kJ/mol = 854 kJ/mol
Therefore, the total bond energy in the products of the reaction is 854 kJ/mol.