Gas Laws · CSEC Physics

54 past-paper questions on Gas Laws, part of Thermal Physics and Kinetic Theory, from every CSEC Physics paper on Quelpr.

1. 4(b)(i)2 marks· CSEC Physics · 1990 · Paper 2Using the axes provided, sketch the graph expected when plotting the length of the air column against the kelvin temperature, T.
2. 4(b)(ii)2 marks· CSEC Physics · 1990 · Paper 2State the 'law' which this experiment is used to investigate.
3. 4(b)(iii)1 mark· CSEC Physics · 1990 · Paper 2Theory suggests that the volume of the gas becomes zero at a certain temperature. What is the value of this temperature?
4. 4(c)5 marks· CSEC Physics · 1990 · Paper 2A cylinder contains gas at 10 °C and 8.5 x 10^5 Pa. It is fitted with a valve which opens when the pressure is 1 x 10^6 Pa. At what temperature will the valve open?
5. 2(c)(i)2 marks· CSEC Physics · 1991 · Paper 2Explain why adding more air into a car tyre increases its internal pressure.
6. 2(c)(ii)2 marks· CSEC Physics · 1991 · Paper 2Explain why the pressure in a car tyre increases when it gets hot.
7. 2(d)4 marks· CSEC Physics · 1991 · Paper 2Nitrous oxide gas inside a cylinder exerts a pressure of 5.0 × 10⁵ Pa at 17 °C. Calculate its new pressure when heated to 37 °C before use.
8. 4(c)3 marks· CSEC Physics · 1997 · Paper 2In terms of the kinetic theory of gases, why does the pressure of the gas in a sealed container rise when the temperature rises?
9. 1(a)1 mark· CSEC Physics · 1998 · Paper 2Explain how you would ensure that the temperature of the gas remains constant during the experiment.
10. 1(b)9 marks· CSEC Physics · 1998 · Paper 2Given the relationship 1/V = k * P, read off values of V from the graph at the specified pressures to complete Table 1, and calculate the corresponding values of 1/V.
11. 1(d)2 marks· CSEC Physics · 1998 · Paper 2State what conclusion can be drawn from the plotted graph, giving a reason for your answer.
12. 1(f)(i)3 marks· CSEC Physics · 1998 · Paper 2Calculate the volume of the air in the tube if the pressure is increased to 550 kPa, assuming 1/V = k * P applies.
13. 1(f)(ii)2 marks· CSEC Physics · 1998 · Paper 2Calculate the pressure of the air when its volume is at its maximum of 65 cm^3.
14. 4(a)(i)2 marks· CSEC Physics · 2021 · Paper 2On Figure 4, sketch the graph of pressure versus temperature (in degrees Celsius) for an ideal gas.
15. 4(a)(ii)2 marks· CSEC Physics · 2021 · Paper 2Explain how the graph could be used to derive the Kelvin scale.
16. 4(a)(iii)2 marks· CSEC Physics · 2021 · Paper 2Using T to represent the Kelvin temperature and θ to represent the Celsius temperature, state the mathematical relationship between the Kelvin and Celsius temperature scales.
17. 4(b)5 marks· CSEC Physics · 2021 · Paper 2A container stores 5.0 m³ of gas at a pressure of 13 atmospheres and a temperature of -23 °C. Calculate the volume that the same gas would occupy at a temperature of 27 °C and atmospheric pressure of 1 atmosphere.
18. 3(b)(ii)1 mark· CSEC Physics · May/June 2022 · Paper 2State the value of the ice point on the Kelvin scale.
19. 3(c)(i)1 mark· CSEC Physics · May/June 2022 · Paper 2State the law associated with the graph in Figure 3.
20. 3(c)(ii)3 marks· CSEC Physics · May/June 2022 · Paper 2Use the graph in Figure 3 to determine the volume when the pressure is 250 kPa.
21. 3(c)(iii)4 marks· CSEC Physics · May/June 2022 · Paper 2Use your answer in (c)(ii) to calculate the new volume when the pressure is increased from 250 kPa to 975 kPa.
22. 1(a)3 marks· Physics Q1 1(a)Complete Table 1 by calculating the temperature, T / K.
23. 1(a)6 marks· Physics Q1 1(a)With the aid of a diagram, describe a method that the student could have used to obtain her results.
24. 1(c)2 marks· Physics Q1 1(c)From the graph determine V₁, the volume of the gas at -120 °C.
25. 1(d)2 marks· Physics Q1 1(d)At what temperature is the volume 2V₁?
26. 1(e)1 mark· Physics Q1 1(e)Use your graph to determine the value of the length of the air column at 273 K.
27. 1(f)4 marks· Physics Q1 1(f)State Charles' law.
28. 1(f)3 marks· Physics Q1 1(f)From your graph read off the temperature, T₀, at which the volume would be zero. Explain the significance of T₀.
29. 1(g)6 marks· Physics Q1 1(g)In a related practical activity, 2 litres of a gas were heated from 35 °C to 75 °C. If the pressure was kept constant, calculate the final volume of the gas.
30. 1(h)2 marks· Physics Q1 1(h)The pressure on the gas is doubled and the experiment repeated. Draw, on the same set of axes, the line that would be obtained if the experiment is repeated at this higher pressure. Label this line "Line 2".
31. 2(a)(i)2 marks· Physics Q2 2(a)(i)State Boyle's Law.
32. 2(a)(ii)4 marks· Physics Q2 2(a)(ii)Using the axes below, sketch the linear graph you would expect to obtain from a Boyle's Law experiment.
33. 2(a)(iii)3 marks· Physics Q2 2(a)(iii)Write the formula for the General Gas Law, stating clearly what each letter represents.
34. 2(b)(i)4 marks· Physics Q2 2(b)(i)Apply the kinetic theory of matter to explain the increased pressure in that tyre.
35. 2(b)(ii)5 marks· Physics Q2 2(b)(ii)Determine the new temperature of the air in the tyre, assuming no change in the volume. (Atmospheric pressure = 100 KPa).
36. 3(a)(i)1 mark· Physics Q3 3(a)(i)State the equation for the general gas law for an ideal gas.
37. 3(a)(ii)4 marks· Physics Q3 3(a)(ii)State the meaning of EACH symbol stated in the equation in (a) (i).
38. 3(b)8 marks· Physics Q3 3(b)What was the new temperature of the air in the tyre, in degrees Celsius, if the volume of air remained constant?
39. 3(b)(i)5 marks· Physics Q3 3(b)(i)Calculate the new pressure in the tyre. The volume of air is kept constant.
40. 3(b)(ii)5 marks· Physics Q3 3(b)(ii)By using the general gas law, determine, as a result of the rise, the ratio of the final volume to the initial volume of a bubble.
41. 3(b)(ii)2 marks· Physics Q3 3(b)(ii)Using the kinetic theory of matter, explain why the increase in pressure occurred.
42. 3(b)(iii)3 marks· Physics Q3 3(b)(iii)Calculate the ratio of new volume to old volume (V₂/V₁) for the tyre, if the pressure is held constant while the temperature rises from 23°C to 34°C.
43. 3(c)3 marks· Physics Q3 3(c)A gas of volume 60.0 cm³ and initial pressure 2.0 x 10⁵ Pa has its pressure reduced to 1.6 x 10⁵ Pa. If the temperature remains constant, what is the final volume of this gas?
44. 3(c)(i)3 marks· Physics Q3 3(c)(i)Complete Table 3 by converting the temperatures to Kelvin.
45. 3(c)(i)2 marks· Physics Q3 3(c)(i)State Charles' Law.
46. 3(c)(ii)5 marks· Physics Q3 3(c)(ii)Is the 'Pressure Law' supported by this set of data? Explain.
47. 3(c)(ii)8 marks· Physics Q3 3(c)(ii)What is the percentage increase in volume of the gas if the cylinder is heated until the gas temperature reaches 70°C?
48. 5(a)(i)4 marks· Physics Q5 5(a)(i)Describe how the graph of Volume versus Temperature (in Celsius) of a gas can be used to derive the Kelvin scale?
49. 5(a)(i)1 mark· Physics Q5 5(a)(i)State the equation for the General Gas Law.
50. 5(a)(ii)3 marks· Physics Q5 5(a)(ii)The final equilibrium temperature of the blocks is 52 °C. Convert this temperature to Kelvin.
51. 5(a)(ii)5 marks· Physics Q5 5(a)(ii)Explain, in terms of the kinetic theory, how pressure is exerted by the air in the balloon.
52. 5(a)(ii)2 marks· Physics Q5 5(a)(ii)State the mathematical relationship between the Kelvin and Celsius temperature scales.
53. 5(b)(i)4 marks· Physics Q5 5(b)(i)Calculate the volume of the gas if its pressure drops to 1 atmosphere at constant temperature.
54. 5(b)(ii)5 marks· Physics Q5 5(b)(ii)After resetting the piston, the gas returns to its initial pressure and volume. If the volume is now fixed while the gas is heated to 60 °C, calculate the final pressure of the gas.