AO / Question Answers Extra information Marks Spec ref. 01.1 all molecules same size as 1 AO1 P3.1.1 Liquid molecules touching 1 Space between molecules 1 Gases Only a few molecules 1 molecules not touching 1 01.2 more 1 AO1 gas 1 P3.1.1 liquid Accept either order. 1 less, temperature Accept either 2 02.1 The pressure of the gas decreases. no marks if more than 1 AO1 one box ticked. P3.3.2 02.2 The gas molecules hit the container Award no marks if more 1 AO1 surface more than one box ticked. P3.3.2 02.3 0.06 2 260 000 Accept 135 600 (J) with no 1 AO2 working shown for 2 1 135 600 (J) P3.2.3 marks. 03.1 D, C, E 1 mark for one letter in the 2 AO2 correct order. P3.1.1. 2 for all three correct. WS 2.2 03.2 The ice cube may melt Accept any sensible 1 AO3 answer. so the mass will be less 1 WS 3.7 03.3 Accept 2800 with no 1 2×AO2 working shown for 2 1×AO1 2800 marks. P3.1.1 kg/m3 1 1 04.1 0.5 × 45 000 Accept 22.5 (kJ) with no 1 AO2 working for 3 marks. 1 22 500 P3.2.3 1 22.5 (kJ) 04.2 180 25 = 155 Accept 16 275 (J) with no 1 AO2 – working shown for 3 0.5 × 210 × 155 1 P3.2.2 marks. 16 275 (J) 1 04.3 The energy is used to re-join the 1 AO1 molecules. P3.1.1 04.4 Wear gloves. Accept any sensible 1 AO3 answers.
Question Answers Extra information Marks AO / Spec ref. 01.1 all molecules same size as Liquid molecules touching Space between molecules Gases Only a few molecules molecules not touching 1 1 1 1 1 AO1 P3.1.1 01.2 more gas liquid less, temperature Accept either order. Accept either 1 1 1 2 AO1 P3.1.1 02.1 The pressure of the gas decreases. no marks if more than one box ticked. 1 AO1 P3.3.2 02.2 The gas molecules hit the container surface more Award no marks if more than one box ticked. 1 AO1 P3.3.2 02.3 0.06 2 260 000 135 600 (J) Accept 135 600 (J) with no working shown for 2 marks. 1 1 AO2 P3.2.3 03.1 D, C, E 1 mark for one letter in the correct order. 2 for all three correct. 2 AO2 P3.1.1. WS 2.2 03.2 The ice cube may melt so the mass will be less Accept any sensible answer. 1 1 AO3 WS 3.7 03.3 2800 kg/m3 Accept 2800 with no working shown for 2 marks. 1 1 1 2×AO2 1×AO1 P3.1.1 04.1 0.5 × 45 000 22 500 22.5 (kJ) Accept 22.5 (kJ) with no working for 3 marks. 1 1 1 AO2 P3.2.3 04.2 180 – 25 = 155 0.5 × 210 × 155 16 275 (J) Accept 16 275 (J) with no working shown for 3 marks. 1 1 1 AO2 P3.2.2 04.3 The energy is used to re-join the molecules. 1 AO1 P3.1.1 04.4 Wear gloves. Accept any sensible answers. 1 AO3
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