Changes of StateChanges of State

Support MaterialsSupport Materials

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

Chemical changes in matterChemical changes in matter

New Matter is formed.

Burning Rusting Cooking

CHEMICAL CHANGESCHEMICAL CHANGES

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