Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
121–130 of 144 · Normal
Question 121
3 marks · Normal
Answer and see the solution →A fixed mass of gas has pressure Pa at K. The temperature is raised to K and the volume remains constant.
Calculate the new pressure of the gas.
Question 122
4 marks · Normal
Answer and see the solution →A student investigates Boyle's law using a sealed syringe, as shown.
The initial pressure is kPa and the initial volume is cm. By pushing the plunger, the volume is changed to cm while temperature remains constant.
(a)[1 mark]State Boyle's law.
(b)[3 marks]Calculate the final pressure inside the syringe.
Question 123
1 mark · Normal
Answer and check →When a gas is heated at constant pressure, which of the following will increase?
- A.Its density
- B.Its volume
- C.Its mass
- D.Its pressure
Question 124
4 marks · Normal
Answer and see the solution →A student fills a flexible balloon with air and seals it. The pressure inside the balloon is kPa at C. The balloon is then placed in an oven at C and the pressure reaches kPa.
(a)[1 mark]Convert all temperatures to Kelvin.
(b)[3 marks]Use the gas law to calculate the new volume of the balloon if the initial volume was L.
Question 125
3 marks · Normal
Answer and see the solution →Describe how you could investigate the relationship between the pressure and volume of a trapped gas in a school laboratory, stating the measurements you would take to confirm Boyle's law.
Question 126
3 marks · Normal
Answer and see the solution →A car tyre contains air at a pressure of 230 kPa at 15°C. After a drive, its temperature rises to 40°C. Assume the volume stays constant.
Calculate the final pressure in the tyre. Give your answer to 2 significant figures.
Question 127
4 marks · Normal
Answer and see the solution →The diagram shows a pressure gauge connected to a sealed rigid container filled with air. The container is placed in a cold room and the temperature is monitored.
(a)[1 mark]State what is meant by absolute zero.
(b)[1 mark]The initial temperature of the air is 15 °C. Calculate the temperature in Kelvin.
(c)[1 mark]If the temperature falls to -40 °C, calculate the new temperature in Kelvin.
(d)[1 mark]Explain why the pressure in the container decreases as the temperature falls, referencing ideas about energy of gas particles.
Question 128
3 marks · Normal
Answer and see the solution →A sample of gas is heated from -15 °C to 65 °C at constant volume. The initial pressure is 80 kPa.
Calculate the final pressure of the gas in kPa. Show all your steps and give your answer to 2 significant figures.
Question 129
1 mark · Normal
Answer and see the solution →Room temperature is 25 °C. What is this temperature in kelvin?
Question 130
2 marks · Normal
Answer and see the solution →Explain what happens to the kinetic energy of particles as a substance approaches absolute zero.