A sample of water is boiled. No water escapes and no chemical reaction takes place.
The table shows the volume of the sample before and after boiling.
| State of water | Volume |
|---|---|
| Liquid | 2.5 cm3 |
| Steam | 4250 cm3 |
Calculate the factor by which the volume of the water increases when it boils.
Explain this increase in volume using the particle model.
In a separate experiment, equal volumes of liquid water and steam are each placed in a cylinder fitted with a movable piston. The same increase in pressure is applied to each sample, and neither sample changes state.
Suggest which sample decreases more in volume. Explain your answer.
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.