Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
221–230 of 279
Question 221
2 marks · Normal
Answer and see the solution →State Boyle's law in terms of the relationship between the pressure and volume of a fixed mass of gas at constant temperature.
Question 222
3 marks · Normal
Answer and see the solution →Explain, in terms of the particle model, why increasing the temperature of a gas at constant volume increases the pressure of the gas.
Question 223
3 marks · Normal
Answer and see the solution →A sealed syringe contains 40 cm³ of air at a pressure of 100 kPa. The syringe is slowly compressed to a volume of 16 cm³ at constant temperature. Calculate the final pressure inside the syringe.
Question 224
4 marks · Normal
Answer and see the solution →A student investigates Boyle's law using a sealed syringe containing air. She changes the volume and measures the pressure at constant temperature.
(a)[1 mark]Describe one step the student should take to make sure the temperature of the gas stays constant during the experiment.
(b)[2 marks]The student records the following results:
Volume (cm³) Pressure (kPa) 50 80 40 100 32 125 Show that the product of pressure and volume is roughly constant for these readings.
(c)[1 mark]Suggest why the results might not be perfectly constant.
Question 225
2 marks · Normal
Answer and see the solution →The graph below shows the relationship between the pressure and volume of a fixed mass of gas at constant temperature.
Pressure-volume graph for a fixed mass of gas at constant temperature. Describe the relationship shown by the graph and explain why this relationship occurs using Boyle's law.
Question 226
2 marks · Normal
Answer and see the solution →A bicycle pump gets warm after inflating a tyre quickly. Using the particle model, explain briefly why this happens.
Question 227
1 mark · Normal
Answer and check →Which option best describes the change in particle movement when a gas is heated at constant volume?
- A.Particles move slower and pressure decreases.
- B.Particles move faster and pressure increases.
- C.Particles move at the same speed but pressure increases.
- D.Particles move at the same speed and pressure stays the same.
Question 228
4 marks · Normal
Answer and see the solution →Figure 1 shows a diagram of an air-filled syringe with its tip sealed. The plunger is pressed in to reduce the volume, while the temperature is kept constant.
An air-filled sealed syringe. (a)[2 marks]Explain what happens to the pressure inside the syringe as the plunger is pushed in (the volume decreases and temperature stays the same).
(b)[2 marks]Describe the motion of the air particles inside the syringe as the plunger is pressed in at constant temperature.
Question 229
1 mark · Easy
Answer and check →Which of the following equations relates the pressure and volume of a fixed mass of gas at constant temperature?
- A.p_1 V_1 = p_2 V_2
- B.p_1/T_1 = p_2/T_2
- C.V_1/T_1 = V_2/T_2
- D.p_1 V_1/T_1 = p_2 V_2/T_2
Question 230
2 marks · Easy
Answer and see the solution →A fixed mass of gas has a pressure of 80 kPa and a volume of 200 cm³. If the volume is reduced to 160 cm³ at constant temperature, calculate the new pressure of the gas.