Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Interconversions between the three states of matter
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →A student explains that when a liquid is boiled, only the temperature of the liquid changes. Using particle theory, explain why this statement is incorrect.
Question 2
5 marks · Hard
Answer and see the solution →A sealed glass tube contains substance Y as a solid at −10 °C. The tube is slowly warmed to 90 °C. The melting point of Y is 12 °C and its boiling point is 80 °C.
(a)[1 mark]Name the state change that occurs when substance Y is heated from −10 °C to 20 °C.
(b)[1 mark]State the name of the process when Y changes from liquid at 75 °C to a gas at 85 °C.
(c)[1 mark]What is the name of the reverse process of the state change in part (b)?
(d)[2 marks]Explain, using particle theory, what happens to the arrangement and movement of the particles as Y changes from solid at −10 °C to liquid at 20 °C.
Question 3
2 marks · Hard
Answer and see the solution →Describe, using particle theory, what happens to the forces between particles and their movement when a gas is cooled to become a liquid.