Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
The gas laws
16 practice questions
Practice questions
1–8 of 8 · Easy
Question 1
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 2
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.
Question 3
1 mark · Easy
Answer and see the solution →State the rule of pressure and temperature for a fixed mass of gas at constant volume.
Question 4
2 marks · Easy
Answer and see the solution →A gas has a pressure of 105 kPa at 350 K. What will be its pressure at 420 K, if the volume remains constant?
Question 5
1 mark · Easy
Answer and see the solution →Describe what happens to the volume of a gas if its pressure is doubled at constant temperature.
Question 6
2 marks · Easy
Answer and see the solution →Explain, using the idea of molecules, why the pressure of a gas increases if it is heated at constant volume.
Question 7
3 marks · Easy
Answer and see the solution →A student pumps air into a sealed cylinder. The initial pressure is 90 kPa and the volume is 150 cm³.
(a)[2 marks]If the student reduces the volume to 100 cm³ at constant temperature, calculate the final pressure.
(b)[1 mark]State the gas law used in this calculation.
Question 8
1 mark · Easy
Answer and see the solution →Write the equation that connects the initial and final pressure and temperature of a fixed mass of gas at constant volume.