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1.1 The particle model

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Question 6
F

Liquid X boils at 80 ∘C80\,^\circ\mathrm{C}80∘C.

Some liquid X is placed at one end of a sealed tube. This end is kept at 35 ∘C35\,^\circ\mathrm{C}35∘C. The other end of the tube is colder.

After some time, droplets of liquid X appear at the cold end. No liquid has flowed along the tube and no reaction occurs.

Which sequence explains the transfer and the final particle arrangement?

[1]
A

Boiling then condensation; particles become widely separated, then close together and mobile

B

Evaporation then freezing; particles become widely separated, then close together at fixed positions

C

Condensation then evaporation; particles become close together, then widely separated and mobile

D

Evaporation then condensation; particles become widely separated, then close together and mobile

Markscheme

1.1 The particle model Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 The particle model

48 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.

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