Why does temperature remain constant while a pure solid melts?
Energy is used to break covalent bonds within molecules
Energy is used to overcome attractions between particles
The particles expand instead of moving faster
The particles stop moving until all the solid has melted
84 exam-style questions on Edexcel GCSE Chemistry 3.1 States of matter, covering 3.1.1 The three states of matter and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.