Question
Bond Bond Energy
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?
854
677
435
427
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?
854
677
435
427
Answers
GPT-5 mini
Each HCl has one H–Cl bond (427 kJ/mol). The reaction produces 2 HCl, so total bond energy = 2 × 427 = 854 kJ/mol.