A molten substance freezes in a mould. A simple particle model shows identical solid spheres in their positions before and after freezing. No forces act between the spheres in the model.
Which result of freezing is not explained by this model?
The same particles are present before and after freezing.
The particle arrangement changes from random to regular.
The particles remain the same size during the change.
Energy is released as the particles move closer together.
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.