PropertiesProperties
PhysicalPhysical: observed without : observed without without changing the composition without changing the composition of the substance.of the substance.
ChemicalChemical: the ability of a : the ability of a substance to undergo a specific substance to undergo a specific chemical changechemical change
Properties of MatterProperties of Matter
How It Looks (Shiny ,Dull, Color, etc.) How It Looks (Shiny ,Dull, Color, etc.) How It Feels (Hard, Soft, Rough , Smooth, How It Feels (Hard, Soft, Rough , Smooth,
etc.) etc.) How It Smells (Sweet, Sharp, Terrible, No How It Smells (Sweet, Sharp, Terrible, No
Smell, etc.) Smell, etc.) How It Sounds (Loud, Soft, Echo, No How It Sounds (Loud, Soft, Echo, No
Sound, etc.) Sound, etc.) What It Does (Bounce, Stretch, Tear, What It Does (Bounce, Stretch, Tear,
Break, Magnetism etc.) Break, Magnetism etc.)
Physical changes in matterPhysical changes in matter
A Physical change is a change in how matter looks, A Physical change is a change in how matter looks, but not the kind of matter is it is.but not the kind of matter is it is.
TearTear CutCut FoldedFolded Written Written LiquidLiquid SolidSolid GasGas MixtureMixture SolutionSolution
• Color• Odor• Hardness• Density• melting point• boiling point
Is this a physical change or a chemical change?Is this a physical change or a chemical change? Can you find more than one physical or chemical change in the pictures?Can you find more than one physical or chemical change in the pictures?
PHASE CHANGE NAME PROCESS MATERIAL GAIN OR RELEASE ENERGY?
EXAMPLE
Melting Changing of a solid to a liquid
Gained Left out ice cream
Solidification (Freezing) Changing of a liquid to a solid
Released Making ice cubes
Evaporation (Vaporization)
Changing of a liquid to a gas or vapor
Gained Vaporizer used when sick
Condensation Changing of a gas or vapor to liquid
Released Foggy mirror after shower
Sublimation Changing of a gas directly to a solid or from a solid directly to a gas
Gain if going to gas, released if going to solid
Dry ice
Types of Change of State
Stored Heat and Changes of Stored Heat and Changes of StateState
A material’s temperature rises as heat A material’s temperature rises as heat is added to it unless the material is in is added to it unless the material is in the process of changing state, then the process of changing state, then the temperature will remain the same the temperature will remain the same as it is heatedas it is heated
A cheesy 80s video to help explain the conceptA cheesy 80s video to help explain the conceptEUREKA!!!EUREKA!!!
Change of PhaseChange of PhaseMeltingMelting
CondensationCondensation
FreezingFreezing
EvaporationEvaporation
SublimationSublimation
Boiling: Boiling: Evaporation occurring beneath the liquid’s Evaporation occurring beneath the liquid’s surface.surface.
solid liquid
gas liquid
liquid solid
liquid gas
solid gas