Matter part 2

Properties & Change

Defining Matter

Properties of Matter

Extensive vs. Intensive

Changes in Matter

A. What is Matter?

Anything that has…

mass (an amount)

volume (takes up space)

One of these things just doesn’t belong here… which of the following is not matter?

water energyice air

B. Properties of Matter

Physical PropertyPhysical Property

can be observed without changing can be observed without changing the identity of the substancethe identity of the substance

Chemical PropertyChemical Property

describes the ability of a substance describes the ability of a substance to undergo changes in identityto undergo changes in identity

C. Extensive vs. Intensive

ExtensiveExtensive Physical Property

depends on the amount of matter present

IntensiveIntensive Physical Property

depends on the identity of substance, not the amount

D. Physical Change

Physical Change

changes thechanges the formform of a substance without changing its identity

properties stay the same

E. Chemical Changes

Chemical Change

changes the identitychanges the identity of a substance

products have different properties

a.k.a. chemical reaction

E. Chemical Changes

Signs of a Chemical Change

change in color or odor

formation of a gas

E. Chemical Changes

formation of a precipitate (new solid)

evolution of heat or light

Physical or Chemical Change?

rusting iron

dissolving in

water

burning a log

boiling water

grinding spices

chemical

physical

chemical

physical

physical

F. States of Matter

Solids particles vibrate in place

but can’t move around fixed shape fixed volume

F. States of Matter

Liquids particles move

around but are still close together

variable shape fixed volume

F. States of Matter

Gases particles separate and

move throughout the container

variable shape variable volume

F. States of MatterF. States of Matter PlasmaPlasma

particles collide with particles collide with enough energy to break enough energy to break into charged particles (+/-)into charged particles (+/-)

gas-like, variablegas-like, variableshape & volumeshape & volume

stars, fluorescentstars, fluorescentlight bulbs, plasma TV’slight bulbs, plasma TV’s

F. States of Matter

A phase changephase change is when matter changes from one state to another. i.e. melting, freezing, evaporation

Is a phase change chemical or physical? Boiling => bubbles produced HowHow were bubbles produced?