A-LevelChemistryEquilibriaMay/June 2015Paper 1 Q81 Mark
Nitrogen dioxide, NO₂, exists in equilibrium with dinitrogen tetroxide, N₂O₄. 2NO₂(g) ⇌ N₂O₄(g) ∆H = −57 kJ mol⁻¹ Which conditions give the greatest percentage of N₂O₄(g) at equilibrium? pressure temperature
Ahigh, high
Bhigh, low
Clow, high
Dlow, low
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The correct answer is B. This question tests the candidate's understanding of equilibria within the Chemistrysyllabus. The examiner's mark scheme requires...
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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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