A-LevelChemistryChemical energetics9701/12 · Feb/Mar 2021 · Q321 Mark
An energy cycle for the combustion of methane is shown. [Figure showing energy cycle for combustion of methane] Which expressions can be used to calculate the energy change, ∆H°e? 1 ∆H°cH₄(g) + ∆H°cH₄(g) 2 ∆H°cC(s) + 2∆H°cH₂(g) 3 ∆H°cCO(g) + 2∆H°cH₂(g)
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct answer
B: 1 and 2 only are correct
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 →