The Table gives the density of water in each of its three states.
Table
| State | Name | Density in kg/m3\text{kg/m}^{3}kg/m3 |
|---|---|---|
| solid | ice | 920 |
| liquid | water | 1000 |
| gas | steam | 0.60 |
Explain, in terms of particles, why the density of steam is much lower than the density of liquid water.
For most substances, the solid state is the most dense.
Use the Table to explain why water is unusual.
A student writes:
'When water boils, the water particles get bigger, so the steam takes up more space.'
Explain what is wrong with the student's statement.
A kettle boils 1.8 kg of liquid water until it has all turned into steam.
Calculate how many times larger the volume of the steam is than the volume of the liquid water.
87 exam-style questions on Edexcel GCSE Physics 14.1 Density and states of matter, covering 14.1.1 Kinetic theory and states of matter, 14.1.2 Density, and 14.1.3 Density and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.