Behavior of Gases
Practice Test
1.
Volume constant, the pressure of a confined gas is directly proportional to the ______________.
a.
size of the container
b.
Kelvin temperature
c.
Celsius temperature
d.
molecular mass of the gas
2.
____________ is the pressure that supports a 760-mm column of mercury.
a.
One meter
b.
One atmosphere
c.
One pascal
d.
One lb/in
2
3.
Suppose that a tire pressure gauge reads 32.1 lb/in
2
. If 14.7 lb/in
2
equals 101 300 Pa, what is the pressure in kPa?
a.
1000 kPa
b.
.0422 kPa
c.
2.18 kPa
d.
221 kPa
4.
Temperature constant, the pressure in a gas-filled container is directly proportional to the _______________________.
a.
surface area of the container
b.
molecular mass of the gas
c.
number of gas particles within
d.
volume of the container
5.
The air in tires can support a truck or automobile because gases _________________.
a.
exert pressure
b.
have gravity
c.
have volume
d.
have mass
6.
Charles's law states that at constant pressure, the volume of a gas is _____________________ temperature.
a.
inversely proportional to the Celsius
b.
directly proportional to the Celsius
c.
inversely proportional to the Kelvin
d.
directly proportional to the Kelvin
7.
One atmosphere pressure equals _______________.
a.
1000 kPa
b.
760 Pa
c.
76.0 torr
d.
101.3 kPa
8.
A _____________ is a device used to measure gas pressure.
a.
balance
b.
thermometer
c.
anemometer
d.
barometer
9.
A sample of gas is held in a 10.0-L volume at 175 kPa. The temperature is kept constant while the volume is decreased until the pressure is 350 kPa. What is the new volume of the gas?
a.
5.0 L
b.
10.0 L
c.
1.0 L
d.
175 L
10.
976 L of oxygen at STP is compressed into a 12.0-L tank at 273 K. What is the gas pressure in the tank?
a.
2.00 atm
b.
81.3 atm
c.
1.00 atm
d.
2000 mm Hg
11.
Temperature constant, 20.0 L of gas at 844 mm Hg pressure expands to 40.0 L. What is the new pressure?
a.
422 mm Hg
b.
3.75 kPa
c.
1.33 atm
d.
16 900 mm Hg
12.
6.0 L of a gas exerts a pressure of 2.5 atm. When the pressure is increased to 10.0 atm, the gas volume is ____________.
a.
1.7 L
b.
1.0 L
c.
25 L
d.
1.5 L
13.
____________________ states that equal volumes of gases at the same temperature and pressure contain equal numbers of particles.
a.
Charles's law
b.
Avogadro's principle
c.
Boyle's law
d.
The ideal gas law
14.
What is the volume of 44.6 L of CO
2
initially at 455 K and 3.66 atm when the conditions change to STP?
a.
97.9 L
b.
22.4 L
c.
0.557 L
d.
682 L
15.
A gas exerts a force of 18.0 N over a surface area of 3.00 m
2
. What pressure does the gas exert?
a.
0.167 atm
b.
56.0 lb/in
2
c.
18.0 Pa
d.
6.00 Pa
16.
A soda straw functions as __________________ the liquid up the straw.
a.
air pressure pushes
b.
reduced pressure draws
c.
sucking draws
d.
air pressure pulls
17.
A balloon is filled with 10.0 L of oxygen at 27
o
C. If the temperature of the gas in the balloon increases to 127
o
C, the pressure remains constant, and the balloon does not break, what is its new volume?
a.
47.0 L
b.
6.7 L
c.
133 L
d.
13.3 L
18.
Which of these units is NOT appropriate for expressing gas pressure?
a.
mm of Hg
b.
atm
c.
N
d.
Pa
19.
If all three substances are at the same temperature and pressure, 0.120 L of N
2
gas reacts with 0.360 L of H
2
gas to form _________ of NH
3
gas.
a.
0.480 L
b.
0.100 L
c.
22.4 L
d.
0.240 L
20.
A sample of of N
2
gas occupies .500 L at 555 mm Hg and 62
o
C. If its volume and temperature change to 0.400 L at 122
o
C, respectively, what is its new pressure?
a.
0.763 mm Hg
b.
818 mm Hg
c.
422 mm Hg
d.
1320 mm Hg
21.
In the combined gas law, the _________________ is held constant.
a.
volume
b.
number of gas particles
c.
temperature
d.
pressure
22.
The pressure of a sample of helium in a 1.0-L container is 0.857 atm. What is the new pressure if the sample is placed in a 0.5-L container? (Assume the temperature is constant.)
a.
0.143 atm
b.
0.429 atm
c.
1.38 atm
d.
1.71 atm
23.
A 0.5-L container of nitrogen gas is heated under constant pressure to the boiling point of water. What is its new volume?
a.
0.86 L
b.
0.5 L
c.
0.64 L
d.
0.79 L
