(opposite of physical properties)Chemical
PropertiesCombustionmatches have to be burned in order to determine
if they are combustible. The match is then changed forever.Chem.
Prop. Cannot be observed WITHOUT changing the substance.Physical
ChangeChange in the form or appearance of the matter but not its
composition.Ex: changing shapewadding paper. dissolvingstill taste
the sugar in the tea. They havent changed changing stateice is
still water condensation, vaporization, sublimation,
VaporizationChanging of a liquid to a gasIncludes boiling and
evaporation (different temperatures)Freezing vs
MeltingFreezingliquid to solidMeltingsolid to liquidBoth occur at
the same temperature for a substance (water @ 0 degrees)Chemical
CHANGE5 SIGNS OF A CHEMICAL CHANGE (NOT ALL ARE REQUIRED)Color
changeapple turns brown2. Energy released or gainedgets hot or
coldNew odoreggs rottingGases or solids createdsmoking, bubbling,
precipitateNot easily reversedcant turn water into hydrogen and
oxygenChemical vs. Physical ChangeA physical change retains the
original substance.A chemical change changes the substance into
something NEW.Law of Conservation of MassThe particles in matter
can be rearranged but the mass of the matter ALWAYS remains the
same before and after a chemical OR physical change.
