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# AQA_AS Level Physics Paper 2_Mark Scheme 2022 | Practice Paper 2

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AQA_AS Level Physics Paper 2_Mark Scheme 2022 | Practice Paper 2 - - Section A 1 (a) (i) Heating result in increased pressure because of: 2 more collisions (of molecules) with wall per second OR... more frequent collisions of molecules with walls ✓ greater momentum change (of molecules)per collision ✓ (ii) (Heating results in) faster molecules so more momentum change 2 per collision ✓ (To maintain same pressure] volume increases to reduce the number of collisions per second ✓ (b) (i) ✓ 2 5.9(4) × 10–3 m3 ✓ (ii) 2 ✓ = 1.0 × 103 K (1000 K) ✓ (Total 8 marks) MARK SCHEME Practice Paper 2 Maximum marks: 85 View detailed guidance on the conclusions you can draw from your students' performance in these papers on the MERiT welcome page. Understand how your students compare with others and target revision effectively by entering marks into MERiT. This document is licensed to Haggerston School - MB260045 AS-LEVEL PHYSICS Type your textPage 2 2 (a) (i) mean kinetic energy ( = 3 / 2 kT) = 3 / 2 × 1.38 × 10-23 × (273 + 22) 1 = 6.1 × 10-21 ) ✓ Note 1sf answer 6 × 10-21 J is not given mark (ii) mass of krypton atom 2 = 0.084 / 6.02 × 10-23✓ ( = 1.4 × 10-25 kg) ( = 2 × mean kinetic energy / mass = 2 × 6.1 × 10-21/ 1.4 x 10-25 ) = 8.7 - 8.8 ×104✓ 1st mark is for the substitution which will normally be seen within a larger calculation. allow CE from (i) working must be shown for a CE no calculation marks if mass has a physics error i.e. no division by NA note for CE answer = (i) × 1.43 x 1025 [Show More]

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