PROPERTIES OF MATTER: PHYSICAL & CHEMICAL. PROPERTY – ABILITY TO DO SOMETHING TYPES OF PHYSICAL...
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Transcript of PROPERTIES OF MATTER: PHYSICAL & CHEMICAL. PROPERTY – ABILITY TO DO SOMETHING TYPES OF PHYSICAL...
PROPERTIES OF MATTER: PHYSICAL & CHEMICAL
PROPERTY – ABILITY TO DO SOMETHING
TYPES OF PHYSICAL PROPERTIES –
* INTENSIVE – DO NOT DEPEND ON AMOUNT OF MATTER
* EXTENSIVE – DEPEND ON AMOUNT OF MATTER
INTENSIVE -
TEXTURE, COLOR, ODOR, LUSTER (SHINY), MALLEABILITY (BEATEN INTO SHEETS), DUCTILITY (DRAWN INTO WIRES), CONDUCTIVITY (ALLOW ENERGY TO ELECTRICITY TO FLOW), HARDNESS (SCRATCHING), SOLUBILITY (DISSOLVE), MELTING/FREEZING/BOILING POINT, & DENSITY
COPPER ORE – COPPER – COPPER WIRE
SHEEP WOOL – REMOVED WOOL – DYED WOOL
EXTENSIVE -
MASS, WEIGHT, VOLUME, & LENGTH
DENSITY – AMOUNT OF MATTER IN A GIVEN SPACE
TOOLS – TRIPLE BEAM BALANCE, RULER OR GRADUATED CYLINDERUNITS – GRAMS PER CUBIC CENTIMETER (g/cm3)FORMULA – DENSITY = MASS/VOLUME
D = M/V
HOW TO FIND DENSITY – 1. MASS OUT OBJECT2. FIND VOLUME OF OBJECT (l x w x h, displacement, or liquid in graduated cylinder)3. CALCULATE – MASS DIVIDED BY VOLUME
PRACTICEhttp://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=362
CHEMICAL PROPERTIES*Reactivity with other chemicals*Toxicity (Damage to Organism)*Flammability *Combustion*Oxidation states (rust/tarnish)*Chemical stability*Types of chemical bonds that will form
•Changing from one state to another is a Physical Change.
•If a new substance is formed it is a Chemical Change.
Images are from http://www.chem4kids.com
SIGNS OF PHYSICAL CHANGE
•CHANGED IS BASED ONLY ON PHYSICAL APPEARANCE
•YOU CAN GET THE ORIGINAL SUBSTANCE BACK
•STATE OF MATTER CHANGES
SIGNS OF CHEMICAL CHANGE
•ODOR PRODUCED
•CHANGE IN TEMPERATURE
•COLOR CHANGE
•BUBBLES FORMED
•SOLID FORMED
•SUBSTANCE DISAPPEARS
Chemical Reactions
D. Sublimation - solid gains energy to form a gas (skips liquid stage)
i. particles break away immediately to from gas
Example - dry ice used for cooling things with a gas
E. Condensation - gas loses energy to form a liquid
i. particles get close enough to form liquid
Example - gas around a cool glass of water loses energy/cools to form liquid on the glass