Changes of State
Chemistry: IB Diploma Higher Level, topic 1.1.6
Changes of State
Changes of state are physical changes.
Physical (not chemical) change
- When a material changes state, it is able to recover its old properties if the change is reversed.
- Some chemical reactions are also reversible.
- However, some chemical reactions are irreversible.
- In irreversible chemical reactions, the material would not be able to return to its original properties.
Conservation of mass
- When a substance changes state, its mass is conserved (stays the same).
Test yourself on Changes of State
What type of change is a change of state?
Which of these are true of changes of state?
Changes of state