plumiInternal energy and ideal gases: Edexcel International A Level Physics questions
Every Edexcel International A Level Physics exam question on Internal energy and ideal gases (specification points 128–132), 2019–2025, with its mark scheme and examiner’s report.
Paper
All papers
Exam
All years
Calculations
Q17(a)
The whole paper ↗Q19(a)(ii)
The whole paper ↗Q2(a)
The whole paper ↗- Your answer
Q19(a)
The whole paper ↗Q19(b)
The whole paper ↗Q1(b)
The whole paper ↗Q1(c)(iii)
The whole paper ↗- Your answer
Q13(b)
The whole paper ↗- Your answer
- Your answer
Q3(b)(iii)
The whole paper ↗- Your answer
Q12(a)
The whole paper ↗
All 49 questions on Internal energy and ideal gases, as a list
- June 2025, Unit 5, Q17(a) (5 marks): Calculate the mass of nitrogen gas needed to exert a pressure of 1.12 × 10 5 Pa inside the globe, at a temperature of 22.0 °C. mass of a nitrogen molecule = 4.6
- 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 =
- June 2025, Unit 6, Q2(a) (6 marks): The student used temperatures ranging from 0°C to 100 °C. Devise a method the student could use to estimate a value for absolute zero. Your method should includ
- 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
- January 2025, Unit 5, Q19(a) (3 marks): Calculate the number of argon atoms in the bulb. (3) Number of argon atoms =
- January 2025, Unit 5, Q19(b) (3 marks): While the bulb is on, the pressure of the argon gas is 83% of atmospheric pressure. The manufacturer states that the temperature of the gas inside the bulb is a
- January 2025, Unit 6, Q1(b) (3 marks): The student determined the temperature θ of the fixed volume of air. Describe an accurate method to determine a single value of θ. (3)
- January 2025, Unit 6, Q1(c)(iii) (4 marks): The diameter of the flask was 15 cm. Determine the number of air molecules in the flask. You may assume the volume of air is spherical. (4) Number of air 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
- October 2024, Unit 5, Q14 (5 marks): Microbes at the bottom of a lake release methane gas. The gas rises to the surface of the lake as bubbles. A methane bubble with a diameter of 1.5 × 10 –3 m is
- 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
- June 2024, Unit 5, Q13(b) (4 marks): The pressure of helium inside the balloon is 1.08 × 10 5 Pa at a temperature of 25 °C. Calculate the mass of helium gas in the balloon. volume of balloon = 7020
- January 2024, Unit 5, Q1 (1 mark): Ice at 0 °C melts into water at 0 °C. Which row of the table gives the changes in mean molecular kinetic energy and mean molecular potential energy as the ice m
- 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
- January 2024, Unit 5, Q14 (5 marks): A tyre on a racing bicycle contains nitrogen at a temperature of 22 °C. The nitrogen in the tyre has a volume of 2.85 × 10 –4 m 3. The pressure of the nitrogen
- 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
- October 2023, Unit 5, Q12 (4 marks): A student investigated the relationship between the pressure and volume of a fixed mass of gas at constant temperature. He used his data to plot the following g
- October 2023, Unit 6, Q3(b)(iii) (3 marks): The gradient of the graph is given by gradient = − Mg kT where M = mass of one air molecule k = Boltzmann constant T = 288 K Determine a value for M. (3) M =
- June 2023, Unit 5, Q9 (1 mark): Two gas cylinders have the same volume. One cylinder contains nitrogen gas. The other cylinder contains oxygen gas. Both gases are at the same temperature and p
- June 2023, Unit 5, Q12(a) (3 marks): Show that the number of molecules of nitrogen gas released into the airbag is about 2 × 10 24. temperature of gas in airbag = 25 °C (3)
- June 2023, Unit 5, Q12(b) (2 marks): Nitrogen gas escapes from small holes in the inflated airbag. The pressure decreases to 3.45 × 10 4 Pa. Calculate the number of nitrogen molecules that escape f
- 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(a) (4 marks): A scuba tank contains air at a pressure of 1.28 × 10 7 Pa and a temperature of 17.5 °C. The scuba tank is left outside on a sunny day and the temperature of the
- 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. (
- October 2022, Unit 5, Q2 (1 mark): The pressure law states that, if certain conditions are met, the pressure exerted by an ideal gas is proportional to the temperature of the gas. Which of the fo
- October 2022, Unit 5, Q12 (5 marks): A cylinder contains oxygen gas at a temperature of 25 °C and a pressure of 1.4 × 107 Pa. Calculate the density of the oxygen gas in the cylinder. mass of an oxy
- June 2022, Unit 5, Q7 (1 mark): A fixed mass of a gas occupies a constant volume. The temperature of the gas is increased. Which of the following is not true? A The internal energy of the gas
- June 2022, Unit 5, Q8 (1 mark): Boyle’s law states that, under certain conditions, the pressure exerted by a gas is inversely proportional to the volume occupied by the gas. Which of the follo
- 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, Q5 (1 mark): A fixed mass of an ideal gas has a volume V and exerts a pressure p. The absolute temperature of the gas is T. When the gas is heated, the new pressure is 4p. W
- January 2022, Unit 5, Q13(a) (3 marks): Calculate the volume of the balloon at the maximum height. (3) Volume of balloon =
- 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
- January 2022, Unit 6, Q1(a) (1 mark): Suggest why one end of the tube is left open. (1)
- January 2022, Unit 6, Q1(c)(ii) (3 marks): The student recorded the following measurements. θ / °C l / cm 19.0 16.0 35.0 16.9 49.0 17.7 The student predicted that a graph of l against θ could be used to
- October 2021, Unit 5, Q14(a) (3 marks): At a temperature of 20.0 °C and a pressure of 1.01 × 105 Pa the volume occupied by 1 mole of carbon dioxide is 0.0241 m3. Show that the number of molecules in 1
- 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)
- June 2021, Unit 5, Q11(b) (2 marks): The apparatus is used in a laboratory where the temperature is 293 K. When the air occupies a volume of 2.43 × 10−3 m3 the reading on the pressure gauge is 1.05
- 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
- January 2021, Unit 5, Q14(a) (3 marks): The gas in the cylinder is at a temperature of 20 °C. Calculate the pressure exerted by the gas. (3) Pressure exerted by gas =
- January 2021, Unit 5, Q14(b) (2 marks): Gas is removed from the cylinder. The temperature of the gas decreases by 5.0 °C and the new pressure of the gas is 4.50 ´ 105 Pa. Calculate the percentage of t
- 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, Q8 (1 mark): A solid is heated and it melts at a constant temperature. Which row of the table shows how the kinetic energy and the potential energy of the molecules change a
- October 2020, Unit 5, Q17(a) (6 marks): A football was inflated with air at a temperature of 16.0 °C. When inflated, the circumference of the football was 68.5 cm and it contained 2.50 × 1023 molecule
- 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
- October 2020, Unit 5, Q19(b)(i) (3 marks): Explain how this cooks the food. (3)
- October 2020, Unit 5, Q19(b)(ii) (2 marks): Suggest why the transfer of energy from the microwaves may be less efficient for ice than for liquid water. (2)
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