A sealed container holds two substances. Each letter represents one atom. The container is heated.
| Before heating | After heating | |
|---|---|---|
| Particles present | A-A and B-B | A-B only |
| Spacing of particles | Touching | Far apart |
A student concludes, "This was only a physical change because the particles moved further apart."
Evaluate the student's conclusion using the data.
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.