A-LevelChemistryEquilibriaMay/June 2017Paper 1 Q101 Mark
A reaction involved in the Contact process is shown. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) ΔH° = –197 kJ mol⁻¹ The reaction is investigated at 200 kPa and 700 K and the value of the equilibrium constant, Kp, is found to be Y. The reaction is then investigated at 1000 kPa and 700 K and the value of Kp is found to be Z. Which statement comparing Y and Z is correct?
AY and Z are the same.
BY is greater than Z.
CZ is 2.2 times greater than Y.
DZ is 5.0 times greater than Y.
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of equilibria within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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