INTERVENTION FOR CHEMISTRY
Introduction to Chemistry
1.
Classification and states of matter
Matter- anything that has mass and occupy space.
-it can exist in different phases in solid, liquid, and gas.
-it is divided into two categories it occurs in nature as pure substance or mixture.
MATTER
Pure Substance
-any matter that has fixed
chemical compound composition
and characteristics properties.
Mixture
Air = Mixture
-two or more substances are
mixed together.
Compositions of air = Pure
Substance
Element
Compound
Heterogeneous
Homogeneous
-substance that
cannot be broken
down into
chemically simpler
components.
-substance can be
broken down.
substance
composed of two or
more elements.
-nonuniform
mixture in which
the components
separate and the
composition varies.
-which the
composition of its
constituents is
uniformly mixed
throughout.
Ex. Aluminum and
gold
Ex. Water
=hydrogen and
oxygen Sugar
=carbon, hydrogen
and oxygen
Ex. Filtrationmixture of sand and
water
-also called solution
= solute and solvent
Suspension
Colloids
-heterogeneous
mixtures involving
fluid and separated
if they are left
standing long
enough.
-mixtures that fall
between a solution
and a
heterogeneous
mixtures
Ex. water and oil –
due to lower
density
- a mixture is
considered colloidal
if it typically does
not spontaneously
separate or settle
out as time passes
Ex. Coffee mixture
=carbon, hydrogen
and oxygen
and cannot be
completely
separated by
filtering through a
typical filter paper.
Ex. Tyndal effect
Introduction to Chemistry
1.
Classification and states of matter
Matter- composed of individual tiny parts known as atoms.
Solids
Liquids
Gas
-definite shape
-no definite shape
-no definite shape
-definite volume
-definite volume
-no definite volume
-high density
-mid to high density
-low density
-slightly
compressible
-slightly
compressible
-highly
compressible
Ex. Aluminum and
gold
Viscous Liquids- honey and other syrup
Density= mass/volume
d(solid) > d(liquid)
*Solids have the higher density than liquids and gasses has lower density
*The lower the density the highly it is compressible
Phase Change
Heat Solid Heat Liquid Heat Gas
ice
Endothermic process
Solid to Liquid Melting
Liquid to Gas Vaporization
Solid to Gas Sublimation
Exothermic process
Liquid to Solid Freezing
Gas to Liquid Condensation
Gas to Solid Deposition
steam
Plasma
-ionized gas
Gas + heat = Plasma
(ionization)
Reverse
(recombination)