Note AcademyNote Academy
Start

Chemistry · May / June 2024 · Paper 12 · Question 15

5070Exothermic and endothermic reactions

Hydrogen and chlorine react to form hydrogen chloride. H2 + Cl2 → 2HCl Bond energy data is given in the table. | bond | bond energy in kJ / mol | | H–H | 436 | | Cl–Cl | 242 | | H–Cl | 431 | What is the enthalpy change, ΔH, for this reaction?

  1. A–247 kJ / mol
  2. B–184 kJ / mol
  3. C+184 kJ / mol
  4. D+247 kJ / mol

As printed in the paper

Show the answer

Correct answer: B. –184 kJ / mol

Sit this whole paper →More on Exothermic and endothermic reactions

Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.