Chapter 10:
The Kinetic Theory of Matter
Practice Test
1.
The energy released as 1 kg of a substance _____________ at its freezing point is called its heat of fusion.
a.
solidifies
b.
evaporates
c.
freezes
d.
melts
Hint
2.
Gas particles _______________ kinetic energy when they collide with other particles or the walls of their container.
a.
lose some
b.
gain some
c.
gain much
d.
lose no
Hint
3.
At the same temperature, a steam burn may be more severe than a water burn because of water's high _______________________.
a.
mass
b.
polarity
c.
heat of vaporization
d.
density
Hint
4.
A temperature of 0 K is known as _______________.
a.
the melting point of water
b.
0
o
C
c.
absolute zero
d.
the freezing point of air
Hint
5.
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.
sublimation point
b.
joule of heat
c.
heat of vaporization
d.
energy of condensation
Hint
6.
At room temperature, gas particles move at roughly _____________ m/s.
a.
0.1 to 0.5
b.
10 000
c.
100 to 1000
d.
1 to 2
Hint
7.
The pressure of a substance in equilibrium with its liquid is called its _________________.
a.
vapor pressure
b.
temperature
c.
freezing point
d.
rate
Hint
8.
A state of ___________ is reached in a sealed container that contains significant amounts of both a liquid substance and its vapor.
a.
reaction
b.
Equilibruim
c.
freezing
d.
elevation
Hint
9.
______ K = 100
o
C.
a.
273
b.
373
c.
100
d.
-460
Hint
10.
The temperature of a substance _________________ as its heat of fusion is added to melt it.
a.
remains at 0 K
b.
increases rapidly
c.
remains relatively constant
d.
decreases
Hint
11.
For most substances, which physical state has the highest density?
a.
liquid
b.
water
c.
gas
d.
solid
Hint
12.
The motions of particles cause them to spread out in a process known as ____________.
a.
diffusion
b.
aeration
c.
condensation
d.
evaporation
Hint
13.
Pressure is the __________ acting per unit area of a surface.
a.
momentum
b.
force
c.
mass
d.
velocity
Hint
14.
The constant, random motion of tiny chunks of matter is called _________________.
a.
kinetic motion
b.
parabolic trajectory
c.
linear motion
d.
Brownian motion
Hint
15.
When materials called _____________ melt, they lose their rigid organization in only one or two dimensions.
a.
solid crystals.
b.
solids
c.
liquids
d.
liquid crystals
Hint
16.
A __________ is a flowing, compressible state of matter that has no definite shape or volume.
a. gas
b. plasmoid
c. liquid
d. solid
Hint
17.
The _______________ states that the submicroscopic particles of all matter are in constant, random motion.
a.
Brownian law
b.
kinetic theory
c.
atomic theory
d.
molecular hypothesis
Hint
18.
________________ is the reverse of evaporation.
a.
Melting
b.
Freezing
c.
Boiling
d.
Condensation
Hint
19.
___________ is the most common form of matter in the universe but the least common on Earth.
a.
Liquid
b.
Gas
c.
Plasma
d.
Solid
Hint
20.
A solid that has no regular structure is said to be ____________.
a.
cubic
b.
amorphous
c.
crystalline
d.
hexagonal
Hint
