A-LevelChemistryChemical energetics9701/12 · Oct/Nov 2010 · Q41 Mark
Methanol may be prepared by the reaction between carbon monoxide and hydrogen. CO(g) + 2H₂(g) → CH₃OH(g) The relevant average bond energies are given below. E(C=O) 1077 kJ mol⁻¹ E(C-O) 360 kJ mol⁻¹ E(C-H) 410 kJ mol⁻¹ E(H-H) 436 kJ mol⁻¹ E(O-H) 460 kJ mol⁻¹ What is the enthalpy change of this reaction?
A-537 kJ mol⁻¹
B-101 kJ mol⁻¹
C+101 kJ mol⁻¹
D+537 kJ mol⁻¹
✓ Correct answer
B: -101 kJ mol⁻¹
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Chemical energetics and see which topics are most likely to come up next.
Sign up free →