[Chemistry 2 Homework Packet Answer Key]
#1.
Pond…
Puddle
Alcohol
Blue
Boiling
Burning
Butter
Can…
Cracking
Cutting
Density
Digestion
Dissolving
Flammability
Glass
Hardness
Iron
Is reactive
Leaves
Lighting
Luster
Magnetizing
Melting
Melting pt.
Mowing
Odor
Paint
Solubility
Sour taste
Stretching
Supports
Water boils
Will form…
Wood rot…
Phys.
Prop.
Phys.
Change
X
X
X
Chem.
Prop.
Chem.
Change
Chapter 2- Energy & Matter
#9. Temperature increases
#10. Vapor
#11. Increases
X
X
#12. Heat Energy
X
X
X
#13. Density increases
#14. Density decreases
X
X
#15. No
X
X
X
X
#16. E
#17. 0°C
X
X
X
X
X
X
X
X
X
#18. 5 Minutes
#19. 100°C
#20. Temp. is constant, heat energy increases/
Temp. is constant, heat energy increases
#21. At both phases changes temperature remains
constant while heat energy was increasing
X
X
X
X
X
#22. 11/12 minutes
#23. 30°C
X
X
#24. 70°C
X
X
X
X
#2. No
#3. Yes
#4. Yes
#5. Heat Energy. How? Temperature= Constant
#6. Movement increases, particles lose rigidity and
move about each other.
#7. Movement increases, particles move farther
apart from each other.
#8. Remains the same/ changes/ remains the
same/ changes
#25.
B
D
A
D
A
A
C
D
B
C
B
B
D
D
C
D
D
A
C
D
A
C
D
B
B
C
[Chemistry 2 Homework Packet Answer Key]
#26a. Water is boiling and separating from the
solution.
#30.
b. a different distillate will begin to condense.
H
Hg
c. A new distillate compound is being separated
and collected.
He
B
Li
Al
Na
C
K
Si
Be
Sn
Mg
Pb
Ca
N
#28. Magnetism. Iron filings will be attracted to the
magnet whereas the Aluminum filings will not.
Sr
P
Ba
As
#29. Filter sand; distill alcohol, oil & water.
Cr
Sb
W
O
Mn
S
Fe
F
Ni
Cl
Pd
Br
Pt
I
Cu
Ne
Ag
Ar
Au
Kr
Zn
Xe
Cd
Rn
d. 3. There were three separate boiling points
reached.
e. This is a solid residue which was unnoticed in the
original solution because it was completely
dissolved.
#27a. Filtration b. Filtration c. Crystallization
d. Distillation e. Chromatography f. Distillation
Chapter 2- Energy & Matter
[Chemistry 2 Homework Packet Answer Key]
#31.
Chapter 2- Energy & Matter
#38. F C B A E D
a)
#
MOLECULES
# IND.
ATOMS
# TOT.
ATOMS
2
Na:2, H:2, C:2,
O:6
12
#39.
a)
320
b)
-61
c)
1273
d)
-241
e)
253
f)
3847
g)
173
h)
28
b)
1
Mg:1, O:2, H:2
5
c)
3
H:9, P:3, O:12
24
d)
1
N:3, H:12, P:1,
O:4
20
e)
1
C:6, H:12, O:6
24
f)
4
Ca:4, C:4,
O:12
20
#41. Solids/Liquids
g)
2
Al:4, O:6
10
#42. Chemical/ Physical
h)
1
N:1, H:5, O:1
7
#43. 1500°C
i)
3
Ba:3, O:6, H:6
15
j)
1
C:2, H:6, O:1
9
k)
4
Ca:4, Cl:2,
O:6
12
l)
1
Al:2, S:3, O:12
17
m)
1
Cu:1, S:1, O:4
6
3
N:6, H:24, S:3,
O:12
45
N)
REVIEW:
#40. Matter
#44. 1500°C
#45. 2750°C
#46. 2750°C
#47. Solid
#48. Solid
#49. Liquid
#32. Energy
#50. Gas
#33. Radiant
#51. Stays constant
#34. Potential
#52. Stays constant
#35. Joule
#53. 293K
#36. Created/ Destroyed
#54. 1337K
#37. Kinetic
#55. Boiling Point, Melting Point, Freezing Point,
Density, Color, Odor, Luster, Brittle, hardness, taste,
magnetism, etc.
#56. Reacts with acid/base, Flammable, Rusts,
Solubility, etc.
[Chemistry 2 Homework Packet Answer Key]
#57.
a)
P
b)
P
C)
C
d)
C
e)
P
f)
P
g)
C
h)
C
i)
P
j)
C
Chapter 2- Energy & Matter
cannot be seen. Mixtures will show the Tyndall
Effect and solutions will not. Solutions are
uniform in compositions whereas Mixtures are
not uniform. Similarities: both mixtures and
solutions are not chemically bonded. Both
mixtures and solutions can be separated by
physical means. Both are classifications of
matter.
#61. Elements are atoms of only ONE kind whereas
compounds are TWO or MORE atoms
chemically bonded together. Compounds can
be chemically decomposed whereas elements
cannot be broken down any further.
Similarities: they are both pure substances.
#62a. 4 b. 12 c. 48 d. 4 e. 16 f. 84
CUMMULATIVE REVIEW
#63. 0.15
#58.
#64a. 5 b. 3 c. 2
Homogeneous or
Heterogeneous
Element, Compound,
Mixture, Solution
Salt Water
Homo
Solution
#66. 54g
Iron
NA
Element
#67. 1.0420%
Salt
NA
Compound
MgBr
NA
Compound
Choc. Chip
Hetero
Mixture
Ocean Water
Homo
Solution
Carbon Diox.
NA
Compound
Manganese
NA
Element
Paint
Hetero
Mixture
Snickers Bar
Hetero
Mixture
#59. Mixture is separated by physical means
whereas Compounds are bonded together
and require chemical means of separation
techniques.
#60. Mixtures can be seen with the naked eye
whereas solutions have small particles that
#65. D.1000g/1kg = 1
#68. 4.5x10-6km