Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Ideal Gas Molecules
70 practice questions
Topics covered
Practice questions
51–60 of 70
Question 51
1 mark · Easy
Answer and check →A scientist cools a gas sample to -10 °C. What is this temperature in Kelvin?
Question 52
1 mark · Easy
Answer and check →The temperature inside a refrigerator is 275 K. What is this temperature in degrees Celsius?
Question 53
2 marks · Easy
Answer and see the solution →Explain why scientists use the Kelvin scale, rather than the Celsius scale, when working with gas laws.
Question 54
1 mark · Easy
Answer and see the solution →A block of ice is stored at absolute zero. Describe the energy of its particles at this temperature.
Question 55
1 mark · Easy
Answer and check →The melting point of iron is 1535 °C. What is this temperature in Kelvin?
Question 56
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 57
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 58
1 mark · Normal
Answer and see the solution →Room temperature is 25 °C. What is this temperature in kelvin?
Question 59
2 marks · Normal
Answer and see the solution →Explain what happens to the kinetic energy of particles as a substance approaches absolute zero.
Question 60
1 mark · Normal
Answer and check →Which temperature is closest to absolute zero?
- A.0 °C
- B.-273 °C
- C.273 K
- D.100 K