A-LevelChemistryEquilibriaOct/Nov 2017Paper 2 Q212 Marks
At 450 K phosphorus(V) chloride, PCl5(g), decomposes to form phosphorus(III) chloride, PCl3(g), and chlorine, Cl2(g). A dynamic equilibrium is established as shown. PCl5(g) ⇌ PCl3(g) + Cl2(g) ΔH = +124 kJ mol-1 When 2.00 mol of PCl5(g) are decomposed at 450K and 1.00 × 10^5 Pa the resulting equilibrium mixture contains 0.800 mol of Cl2(g).
✓ Correct Answer
The correct answer is —. 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep