ORGANIC CHEMISTRY Y. ORGANIC CHEMISTRY - … CHEMISTRY Y. ORGANIC CHEMISTRY
Chemistry
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Transcript of Chemistry
May.9th.2010Jenny kang
CONTENTS
• What is matter?• What is not matter?• What is pure substance?• What is element?• What is Compounds?• What is mixture? • Types of mixture (heterogeneous mixtures,
homogenous mixtures, mechanical mixture, suspension, emulsion)
• What is reversible change and non-reversible change?
• What is physical change and chemical change?
Matter Is anything that has VOLUME and MASS
VOLUME – Is the amount of space something takes up (put picture of volume)
MASS – Is the amount of matter (put picture of mass)
Examples of matter
Is fire considered matter? Yes, fire is matter. Fire takes up the
spaces and fire itself is mixture of vaporized fuel, oxygen, carbon dioxide, carbon monoxide, and water vapor, etc. So, fire is matter.
non-matter Is anything that doesn’t have volume and
mass
※shadow- Shadow doesn’t take up any place.
※ light-It doesn’t take up any space.
Non-matter
※ heat- Heat isn't matter its just something you feel.
※ gravity- It is a force. It holds us on the surface of the earth, but we can't see it or feel it.
Pure substance
A substance that contains only one kind of particle.
water salt
Element
A pure substance that cannot be broken down into other substance.
beryllium lithium
boron gold
Compounds
A substance that is containing two or more elements.
nitrogen oxygen
Homogenous Mixture
The substance that we can’t see the difference.
milk saltwater
Heterogeneous Mixtures
The substance that we can see the difference.
Suspension
A mixture that clumps of solid or liquid are scattered throughout.
soil fog
Emulsion
A suspension that keeps the parts of the mixture from separating.
milk lotion
soap
Mechanical Mixture
A mixture. We can see two or more different parts inside the mixture.
sand concrete
Reversible Change
Changes that can be reversed
Non-reversible change
Changes that cannot be reversed coffee
Examples of physical change
Mixing BreakingCuttingmeltingBoilingFreezing
Examples of chemical change
Rusting FryingRoasting
BYE~