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30 Cards in this Set

  • Front
  • Back
chemistry
study of the compostion of matter
matter
anything that has mass and takes up space
substance
matter that has uniform and definite compostition
mass
amount of matter an object contains
solid
constant shape
deffinite volume
low expansion on heating
low compress ability
liquid
shape changes
definite volume
medium expansion on heating
low compress ability
gas/vapor
shape changes
voume changes
high expansion on heating
high compress ability
vapor: def:
the gaseous state of a substance that is normally a solid or liquid at room temp.
physical change
change occurs but you still have the same substance.
ex: boiling, melting, grinding, tearing
physical property
properties that can be measured or observed without changing the composition of matter.
ex: melting pount, boiling point, density, color
reactants
starting subnstance in a reaction
products
substances formed in a reaction
chemical change
change that affects the chemical properties and creates a new substance.
chemical property
properties that can be observeed only when substances interact.
ex: flammability, rusting, reactivity w/ acid.
law of conservation of mass
in a chemical or physical change mass is not created or destroyed it is conserved.
element
simploesest from of matter; seperated by physical means
compound
2 or more difrferent elements combined
** can only be seperated by chemical means
ex: sugar= carbon+water; c12H22O11 --> H2 + H20
chemical symbols
represents an element
mixture
blend of two or more SUBSTANCES
solutions
a homogeneous mixture
phase
part of a mixture with uniform compostion.
heterogenous mixture
not uniform in composition
Ex: 2 shovels of dirt arn't exactly the same.
distillation
a method using boiling points and oncdesation to seperate liquidss form solids & gases.
homogeneous mixture
uniform in compostion
EX: salt water, recipies.
solution ex:
gas-gas
air
solution ex:
liquid-gas
humidity
solution ex:
gas-liquid
carbonated water
solution ex:
LIQUID-LIQUID
rubbing alcohol
solution ex:
solid-liquid
salt water
solution ex:
solid-solid
brass, bronze, white gold