A candle is made of wax. When the candle is lit, the solid wax near the wick turns into a liquid. The liquid wax travels up the wick, turns into a gas and burns.
The table shows four changes.
| Letter | Change |
|---|---|
| A | solid wax turning into liquid wax |
| B | wax gas burning in air to form carbon dioxide and water |
| C | water vapour turning into liquid water on a cold window |
| D | liquid wax cooling to form solid wax |
Name the change of state when solid wax turns into liquid wax.
Give the letter of the one change in the table that is a chemical change.
Give two differences between a physical change and a chemical change.
Explain, in terms of particles and energy, how the liquid wax in the wick turns into a gas.
53 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.