A vapour is cooled in a laboratory apparatus until all of it has condensed and the liquid formed has begun to cool. The table shows the temperature readings.
| Time / min | 0.0 | 2.0 | 4.0 | 6.0 | 8.0 | 10.0 |
|---|---|---|---|---|---|---|
| Temperature / ∘C^\circ\text{C}∘C | 110 | 95 | 80 | 80 | 80 | 70 |
Use the data to state the time interval during which the vapour is changing state. Explain why the temperature remains constant during this interval and state what happens to the internal energy of the vapour.
110 exam-style questions on Edexcel GCSE Physics 14.2 Specific heat capacity and latent heat, covering 14.2.1 Heating, temperature and changes of state, 14.2.2 Specific heat capacity and specific latent heat, 14.2.3 Specific heat capacity calculation, 14.2.4 Specific latent heat calculation, and 14.2.5 Reducing energy transfer through thermal insulation. Each one has a worked solution and a mark scheme showing where the marks go.