Demonstrate that dissolving, mixing and changes of state are reversible changes.
Explain that some changes result in the formation of new materials, and that this kind of change is not usually reversible, including changes associated with burning and the action of acid on bicarbonate of soda.
Activities in the module:
CSPRC3YS466-Evolution of gas
CSPRC3YS467-Change in temperature
CSPRC3YS468-Change in colour
CSPRC3YS470-Dissolving and evaporation