chemical and physical properties of matter -and chemical and physical changes

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PROPERTIES OF MATTER
• Chemical
• Physical
Physical properties
Observed without converting to another substance
Intensive – characteristic of the substance
Extensive – depends on amount of substance present
(mass and volume most important!)
Change of state – physical change
– no change in Composition –
ice liquid water water vapor – still H2O
Other examples:
hardness, mp bp, solubility, density, viscosity,
color, taste, Smell (senses) –intensive

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Chemical properties
• Relates to reactions of the substance
– Rx change composition of substance

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Chemical properties describe how it can
change into other substances
• In a chemical change – atoms rearrange to
form new substances with new chem/phy
properties
• What does it react with
– O2, acids, bases, oxidizers, reducers
• Does it rust, tarnish or combust?
Atoms rearranging

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