1. Physical and Chemical Changes

2. Physical Change Substance looks different, but it’s not Reversible
Characteristic properties remain the same
Types:
Phase changes
Dissolution
Deformation

3. Phase Changes Transformation of matter from one state to another
States of matter : Solid, Liquid and Gas
Changes of state:
Fusion (melting) = S L
Vaporization (evaporation) = L G
Deposition = G S
Freezing (solidification) = L S
Sublimation = S G
Condensation = G L
See textbook figure 20 on p. 191

4. Chemical Changes The substance has changed It looks and is different
Irreversible

5. Signs of Chemical Change
Colour change: rust, browning of an apple
Bubbling/gas produced: vinegar + baking soda
Precipitate formed: 2 solutions that mix and a solid forms in the new solution
Heat or light given off: fireworks
Temperature or mass change