Pure Substances
substances made of the same type of atoms or molecues
pure substance
mixture that is uniform in appearance
homogeneous
amount of matter in an object
mass
ID melting on the heating curve
A
gas changing into a liquid
condensation
pure substance made of one type of atom
element
mixture where individual substances are visible
heterogeneous
amount of space an object occupies
volume
ID liquid on the heating curve
B
liquid changing into a gas
evaporation
pure substance made of different types of atoms
compound
mixture that settles/separates upon standing
suspension
force of gravity acting on an object
weight
ID boiling on the heating curve
C
a puddle drying is an example of
evaporation
Is this an element or compound? O2
element
mixture with medium size particles that does NOT separate and exhibits Tyndall effect
colloid
*which object most dense
A
ID location(s) where CPE is increasing
A & C
what happens to the ENERGY of molecules in a liquid that causes them to evaporate
increases
Is this an element or compound? NaCl
compound
homogeneous mixture with very small particles - does NOT exhibit Tyndall effect
solution
*which item is the least dense
C
ID location(s) where KE is increasing
B
what happens to the TEMPERATURE of gas molecules that causes them to condense
decreases