Physical vs Chemical
Write PC beside the statements that represent physical changes and CC beside those that
represent chemical changes.
fruit decays ____CC____
sulfur burns ____CC_____
sugar dissolves in coffee ____PC_____
baking a cake ____CC_____
gasoline is burned ______CC_____
An envelope is opened ____PC____
copper forms from electrolysis of
copper (II) sulfate ___CC_______
paper burns __CC_____
a windshield is broken ___PC______
a room is wallpapered ___PC_____
photographic film is developed _CC__
2Na + Cl2  2NaCl
an electric iron is heated __PC__
electrolysis of water produces hydrogen and oxygen __CC___
Fe + S  FeS
ice melts __PC__
__CC_____
a filament in an electric light bulb
glows
___PC_____
____CC____
silver tarnishes __CC____
You experiment with a new substance that you discovered. The properties are listed. Label physcial
properties as PP and chemical properties as CP.
metallic luster __PP____
reacts with hydrochloric acid ___CP____
hardness of 6 on Moh’s scale __PP_____ burns in oxygen to form a white powder __CP____
has a density of 3.0 g/cm3 ___PP____
boils at 950C ___PP____
is solid at room temperature ___PP___
reacts with sodium hydroxide __CP____
rusts when exposed to air ___CP____
can be hammered into thin sheets _PP_____
is soluble in benzene _PP______
is insoluble in water ____PP___
can be formed into wire ___PP___
when placed in acid, white crystals form ___CP___
tarnishes in hydrogen sulfide gas __CP_ forms hydrogen gas when placed in acid
explodes in chlorine gas __CP___
___CP___
gets thicker as more heat is applied after melting __PP__
melts at 650C ___PP__
Circle one answer:
gray solid turns to purple gas when heated __CP____
1. A physical change (always, sometimes, never) produces a change in physical properties.
2. A physical change (always, sometimes, never) produces a change in chemical properties.
3. A chemical change (always, sometimes, never) produces a physical change.
4. A chemical change (always, sometimes, never) produces one or more new substances.
Name five indicators of a chemical change.
1.
2.
3.
4.
5.
Dramatic color change
Formation of a precipitate
Production of a gas
Production of a new odor
Change in energy (change in temp, , light, sound)
Fill in the table
State of Matter
Example at room
Temperature
solid
liquid
gas
Shape (definite or
indefinite)
definite
indefinite
Indefinite
List six physical properties that may be used in identifying a solid.
1.
color
2. density
3.
melting point
4. Boiling point
5.
luster
6. hardness
List four examples of physical changes.
1.
changing size
2.
Changing shape
3.
4
changing state
changing mass
Volume (definite or
indefinite)
definite
definite
indefinite