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Question bank›Edexcel International A Level Physics›5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT

Kinetic theory: ½m<c²> = 3/2 kT: Edexcel International A Level Physics questions

Edexcel International A Level Physics past-paper questions on 5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT, 2019–2025, with mark schemes and examiner’s reports where available.

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AS Unit 1 · Mechanics and MaterialsAS Unit 2 · Waves and ElectricityAS Unit 3 · Practical Skills in Physics IUnit 4 · Further Mechanics, Fields and ParticlesUnit 5 · Thermodynamics, Radiation, Oscillations and CosmologyUnit 6 · Practical Skills in Physics II

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Q19(a)(ii)
June 2025 · Unit 5
2 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q6
January 2025 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q11
October 2024 · Unit 5
2 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT 5.3.2.1 Internal energy and absolute zero
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Q8
June 2024 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q8
January 2024 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q11
October 2023 · Unit 5
3 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT 5.3.2.2 The ideal gas equation (core practical 14)
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Q2
January 2023 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q12(b)(ii)
January 2023 · Unit 5
2 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q17(b)
January 2023 · Unit 5
6 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT 5.3.2.2 The ideal gas equation (core practical 14)
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Q19(a)
June 2022 · Unit 5
3 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q13(b)
January 2022 · Unit 5
2 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q14(b)
October 2021 · Unit 5
3 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q7
June 2021 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q11(a)
June 2021 · Unit 5
4 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q1
January 2021 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q3
October 2020 · Unit 5
1 mark5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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Q17(b)
October 2020 · Unit 5
6 marks5.3.2.3 Kinetic theory: ½m<c²> = 3/2 kT
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All 17 questions on Kinetic theory: ½m<c²> = 3/2 kT, as a list

June 2025, Unit 5, Q19(a)(ii) (2 marks): Calculate the average kinetic energy of gas atoms at the surface of Tau Ceti. (2) Average kinetic energy of gas atoms =
January 2025, Unit 5, Q6 (1 mark): A container is filled with a mixture of two gases, X and Y. The root mean square velocity of molecules in gas X is twice the root mean square velocity of molecu
October 2024, Unit 5, Q11 (2 marks): Helium gas can be used to fill balloons. A cylinder of helium gas contains 1.20 × 10 24 molecules. The temperature of the gas is 293 K. Calculate the internal e
June 2024, Unit 5, Q8 (1 mark): A container is filled with a mixture of two gases, X and Y, at constant temperature. Each molecule of gas X has twice the mass of each molecule of gas Y. The ra
January 2024, Unit 5, Q8 (1 mark): A mixture of helium gas and hydrogen gas is kept at room temperature. Which of the following is correct? A The mean kinetic energy of the helium molecules is gr
October 2023, Unit 5, Q11 (3 marks): Air is used to inflate a balloon. The inflated balloon has a volume of 1.77 × 10 –3 m 3 and contains 5.15 × 10 22 air molecules. The air inside the balloon exer
January 2023, Unit 5, Q2 (1 mark): A cylinder contains a mixture of gas X and gas Y. The mean kinetic energy of the molecules of gas X is EX and the mean kinetic energy of the molecules of gas Y
January 2023, Unit 5, Q12(b)(ii) (2 marks): When the Earth formed, a large proportion of the gas in the Earth’s atmosphere was hydrogen. Explain why hydrogen gas is no longer a large proportion of the gas
January 2023, Unit 5, Q17(b) (6 marks): Explain why the pressure of the air inside the scuba tank increases as the temperature increases. Your answer should refer to the motion of the air molecules. (
June 2022, Unit 5, Q19(a) (3 marks): The lamp contains 1.65 × 1019 mercury atoms in a volume of 1.50 × 10–5 m3. The pressure of the mercury vapour is 4.25 × 104 Pa. Calculate the mean kinetic energ
January 2022, Unit 5, Q13(b) (2 marks): Calculate the decrease in the mean kinetic energy of a hydrogen molecule in the balloon as the balloon rises to the maximum height. (2) Decrease in mean kinetic
October 2021, Unit 5, Q14(b) (3 marks): In a sample of natural gas, the r.m.s. velocity of the carbon dioxide molecules is 60.5 % of the r.m.s. velocity of the methane molecules. r.m.s. velocity = c2
June 2021, Unit 5, Q7 (1 mark): Helium gas in a closed cylinder is heated until the pressure exerted by the helium is four times the original pressure. The volume occupied by the helium stays
June 2021, Unit 5, Q11(a) (4 marks): The pressure of the trapped air increases when the air is forced into a smaller volume. Explain why, using ideas of molecular motion. (4)
January 2021, Unit 5, Q1 (1 mark): A mixture of oxygen gas and nitrogen gas is kept at room temperature. Oxygen molecules are more massive than nitrogen molecules. Which of the following is corre
October 2020, Unit 5, Q3 (1 mark): A closed container holds a mixture of two gases at a constant temperature. Each molecule of gas X has a mass four times that of each molecule of gas Y. What is
October 2020, Unit 5, Q17(b) (6 marks): The pressure inside a football decreases as the temperature of the air inside falls. The volume of the ball remains constant. Explain why, in terms of the motio

Nearby topics:5.3.2.1 Internal energy and absolute zero 5.3.2.2 The ideal gas equation (core practical 14)The whole bank

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