A-LevelChemistryEquilibria9701/12 · May/June 2018 · Q101 Mark
In a particular reversible reaction the yield of product is increased • if the temperature is increased; • if the pressure is decreased. Which equation could describe this reversible reaction?
ACH4(g) + H2O(g) ⇌ 3H2(g) + CO(g) ΔH = +206 kJ mol⁻¹
B4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(g) ΔH = −227 kJ mol⁻¹
C2NO2(g) ⇌ N2O4(g) ΔH = −58 kJ mol⁻¹
D3O2(g) ⇌ 2O3(g) ΔH = +143 kJ mol⁻¹
✓ Correct answer
A: CH4(g) + H2O(g) ⇌ 3H2(g) + CO(g) ΔH = +206 kJ mol⁻¹
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