Chapter 10:
The Kinetic Theory of Matter
Practice Test
1.
At room temperature, gas particles move at roughly _____________ m/s.
a.
10 000
b.
0.1 to 0.5
c.
100 to 1000
d.
1 to 2
Hint
2.
Pressure is the __________ acting per unit area of a surface.
a.
velocity
b.
momentum
c.
force
d.
mass
Hint
3.
________________ is the reverse of evaporation.
a.
Freezing
b.
Condensation
c.
Boiling
d.
Melting
Hint
4.
At the same temperature, a steam burn may be more severe than a water burn because of water's high _______________________.
a.
density
b.
heat of vaporization
c.
polarity
d.
mass
Hint
5.
Because liquid molecules are much closer than gas molecules, liquids are much less ____________ than gases.
a.
flexible
b.
massive
c.
compressible
d.
lattice-like
Hint
6.
______ K = 100
o
C.
a.
373
b.
100
c.
-460
d.
273
Hint
7.
At the same temperature, the average speed of hydrogen molecules is _____________ that of chlorine molecules.
a.
much less than
b.
much greater than
c.
about the same as
d.
slightly less than
Hint
8.
The temperature of a substance _________________ as its heat of fusion is added to melt it.
a.
increases rapidly
b.
remains relatively constant
c.
decreases
d.
remains at 0 K
Hint
9.
The _______________ states that the submicroscopic particles of all matter are in constant, random motion.
a.
molecular hypothesis
b.
Brownian law
c.
atomic theory
d.
kinetic theory
Hint
10.
Gas particles _______________ kinetic energy when they collide with other particles or the walls of their container.
a.
gain some
b.
lose some
c.
lose no
d.
gain much
Hint
11.
A __________ is a flowing, compressible state of matter that has no definite shape or volume.
a. plasmoid
b. solid
c. gas
d. liquid
Hint
12.
The energy released as 1 kg of a substance _____________ at its freezing point is called its heat of fusion.
a.
freezes
b.
melts
c.
solidifies
d.
evaporates
Hint
13.
For most substances, which physical state has the highest density?
a.
water
b.
liquid
c.
solid
d.
gas
Hint
14.
A solid that has no regular structure is said to be ____________.
a.
cubic
b.
crystalline
c.
amorphous
d.
hexagonal
Hint
15.
At the same temperature, ethanol has _____________ vapor pressure than water.
a.
about the same
b.
a much lower
c.
a somewhat lower
d.
a much higher
Hint
16.
A temperature of 0 K is known as _______________.
a.
absolute zero
b.
the freezing point of air
c.
0
o
C
d.
the melting point of water
Hint
17.
The energy required to convert 1 kg of a liquid substance at its boiling point to 1 kg of gas, is called the substance's _________________.
a.
heat of vaporization
b.
energy of condensation
c.
joule of heat
d.
sublimation point
Hint
18.
A state of ___________ is reached in a sealed container that contains significant amounts of both a liquid substance and its vapor.
a.
Equilibruim
b.
reaction
c.
freezing
d.
elevation
Hint
19.
The constant, random motion of tiny chunks of matter is called _________________.
a.
kinetic motion
b.
parabolic trajectory
c.
Brownian motion
d.
linear motion
Hint
20.
Increasing a liquid's temperature causes its vapor pressure to ___________.
a.
remain constant
b.
decrease
c.
increase
d.
change to solid
Hint
