Physical Vs. Chemical Changes
Mr. Lucas
Chemistry 11, Lambrick Secondary
Outline
●
●
●
●
●
Physical Vs. Chemical changes
Common Physical changes
Phase Change Diagram
Dissolving
Practice questions
2
Chemical Changes
● Changes that involve new chemical being formed from old
chemicals
● Examples
● Propane combustion
● Iron rusting
● Unit 5: Chemical Reactions
3
Physical Changes
● Involves a change in phase of a substance
● No new chemicals are formed
● Example: Boiling water
4
Common Physical Changes
● Common physical changes
● Involve changing from one state of matter to another
● Ex: Boiling, condensing, melting, freezing
●
Combining or separating mixtures
● Ex: Dissolving, crystallizing
5
Phases and Phase Changes
● States of matter
● Solid, Liquid, Gas
● Phase Changes
● Boiling, condensing (How are these related?)
● melting, freezing (How are these related?)
● Show “States of Matter” Program
6
Phase Change Diagrams
● Diagrams that show how adding heat to a substances changes
the temperature of the substance
7
Dissolving and crystallizing
● These are physical changes
● They are opposites of each other
● Solute is surrounded by Solvent when dissolved
8