• Physical change
•changes the form of a substance without
changing its identity; does NOT form a
new substance
•Examples: all phase changes, breaking,
cutting
• Melting = Solid  Liquid
• Evaporation = Liquid  Gas
• Condensation = Gas  Liquid
• Freezing = Liquid  Solid
• Sublimation = Solid  Gas
Chemical change
• Process that involves one or more
substances changing into a new substance
•Example: cooking, burning, rust
•change in color or odor
•formation of a gas
•formation of a precipitate (solid)
•change in light or heat
•rusting iron
chemical
•dissolving in water
physical
•burning a log
chemical
•melting ice
physical
•grinding spices
physical
• Physical property-can be observed
without changing the identity of the
substance
• Chemical property- describes the ability
of a substance to undergo changes in
identity
• Examples:
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flammable
burning of a log
magnetic
ice melting
tarnishes in air
melting point
iron rusting
grinding spices
• Property, chemical
• Change, chemical
• Property, physical
• Change, physical
• Property, chemical
• Property, physical
• Change, chemical
• Change, physical
• Write a detailed paragraph (minimum of 6
sentences) about the difference between a
physical and a chemical change. You MUST
include examples of each.
• Physical properties can be divided into
two subcategories.
1. Intensive Properties
2. Extensive Properties
• Does the property change when the amount of
the substance changes?
• Intensive property-does not change with
amount
• Does the property change when the amount of
the substance changes?
• Extensive property-does change with
amount
• Remember:
Edward Must Love Vanessa Now
• Examples:
• boiling point
intensive
• volume
extensive
• mass
extensive
• density
intensive
• conductivity
intensive