Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Change of State
56 practice questions
Topics covered
Practice questions
11–20 of 25 · Easy
Question 11
1 mark · Easy
Answer and see the solution →Name two pieces of apparatus you would use to measure the temperature change in a specific heat capacity experiment.
Question 12
2 marks · Easy
Answer and see the solution →Explain why it is important to use insulation when measuring the specific heat capacity of a substance.
Question 13
3 marks · Easy
Answer and see the solution →A group of students wants to determine the specific heat capacity of a 0.3 kg sample of metal, using the apparatus shown.
(a)[1 mark]State the equation used to calculate the specific heat capacity (c) of the metal.
(b)[2 marks]List two measurements (other than mass) that the students must record during the experiment.
Question 14
2 marks · Easy
Answer and see the solution →In a specific heat capacity experiment, the heater is supplied with a voltage of 10 V and a current of 2.0 A for 5 minutes. Calculate the total energy supplied by the heater.
Question 15
1 mark · Easy
Answer and check →Which measurement should be recorded BEFORE switching on the heater in a specific heat capacity experiment?
- A.The final temperature of the substance
- B.The initial temperature of the substance
- C.The current supplied by the heater
- D.The time heater is turned on
Question 16
3 marks · Easy
Answer and see the solution →A student wants to find the specific heat capacity of a 0.5 kg block. The electric heater supplies energy for 400 s. The current is 3.0 A and voltage is 12 V. The temperature rise is 16 °C.
(a)[1 mark]Calculate the energy supplied by the heater.
(b)[2 marks]Calculate the specific heat capacity of the block.
Question 17
1 mark · Easy
Answer and see the solution →State what happens to the temperature of a substance during melting, while it is still being heated.
Question 18
1 mark · Easy
Answer and check →Which of the following best describes what happens to the energy supplied to a substance at its boiling point?
- A.It is used to raise the temperature further.
- B.It is used to increase the mass of the substance.
- C.It is used to overcome the forces between molecules.
- D.It is used to break the bonds inside the molecules.
Question 19
2 marks · Easy
Answer and see the solution →Describe what a temperature–time graph would look like for a substance that is being heated steadily as it melts from solid to liquid.
Question 20
2 marks · Easy
Answer and see the solution →Explain why the temperature of a substance does not change during boiling, even though energy is still being supplied.