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1.1 The particle model

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Question 1
F

A student melts some lauric acid by heating it to 70 ∘C^\circ\mathrm{C}∘C.

The student then lets the liquid lauric acid cool and measures its temperature every minute.

The graph shows the results.

image

a.

Name the change of state that happens between 5 minutes and 9 minutes.

[1]
b.

What is the freezing point of lauric acid?

[1]
c.

The student reads the thermometer with their eye level with the liquid in the thermometer.

Explain why.

[1]
d.

Describe and explain what happens to the particles of lauric acid from 0 to 12 minutes.

Use the graph and ideas about the arrangement, movement and energy of the particles.

[6]
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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