A student lets a tube of liquid naphthalene cool in air and records its temperature every minute.
| Time / min | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|
| Temperature / ∘C^\circ\mathrm{C}∘C | 95 | 88 | 82 | 80 | 80 | 80 | 80 | 74 | 66 |
Which statement about the naphthalene at 5 minutes is correct?
Only liquid is present and the particles are losing energy
Only solid is present and the particles have stopped moving
Solid and liquid are present and energy is being given out
Solid and liquid are present and no energy is being transferred
84 exam-style questions on Edexcel GCSE Chemistry 3.1 States of matter, covering 3.1.1 The three states of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.