Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Solids, Liquids and Gases
279 practice questions
Topics covered
Practice questions
171–180 of 279
Question 171
3 marks · Normal
Answer and see the solution →Figure 1 shows a diagram of apparatus used for a specific heat capacity experiment.
Apparatus for measuring specific heat capacity (a)[2 marks]State two measurements that must be taken during this experiment, other than temperature.
(b)[1 mark]Explain why the metal block is often surrounded by insulating material in this type of experiment.
Question 172
4 marks · Normal
Answer and see the solution →A student records the following data in a specific heat capacity experiment on a 0.30 kg block of material:
Experimental data Quantity Reading Initial temperature / °C 18 Final temperature / °C 34 Voltage / V 12 Current / A 3.5 Time / s 200 (a)[1 mark]Calculate the change in temperature of the block.
(b)[2 marks]Calculate the energy supplied by the heater.
(c)[1 mark]Use your answers to calculate the specific heat capacity of the material.
Question 173
3 marks · Normal
Answer and see the solution →A student is recording temperature readings during a specific heat capacity experiment and finds that the measured specific heat capacity is much lower than the accepted value for the material.
State and explain two possible experimental errors that could cause the measured value to be too low.
Question 174
3 marks · Normal
Answer and see the solution →Describe a method that a student could use to find the specific heat capacity of water using an electric heater. Include the main steps and measurements the student would need to make.
Question 175
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 176
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 177
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 178
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.
Question 179
2 marks · Easy
Answer and see the solution →A student heats a solid and records its temperature every minute. Describe how the temperature readings would change if the student continues heating the substance until it has fully melted and then further increases the temperature.
Question 180
3 marks · Easy
Answer and see the solution →A student wants to demonstrate how the temperature of stearic acid (a solid) changes as it melts and then becomes a liquid.
(a)[1 mark]Describe one safety precaution the student should take while heating stearic acid.
(b)[2 marks]Explain what happens to the temperature of stearic acid as it is heated, melts, and then is fully in liquid form.