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1.1 The particle model

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Question 40
F

A pure substance has a boiling point of 72 ∘C72\,^\circ\mathrm{C}72∘C and a melting point of 9 ∘C9\,^\circ\mathrm{C}9∘C. It is cooled from 90 ∘C90\,^\circ\mathrm{C}90∘C to 30 ∘C30\,^\circ\mathrm{C}30∘C at constant pressure without reacting. How should its particle model change?

[1]
A

Close mobile particles become fixed in a regular arrangement

B

Fixed particles become widely separated and mobile

C

Widely separated particles become fixed in a regular arrangement

D

Widely separated particles become close together but remain able to move past one another

Markscheme

1.1 The particle model Questions

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

93 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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