Gas Law Practice Exam
1. Standard pressure is equal to
A) 1 atm
C) 273 atm
B) 1 kPa
D) 273 kPa
2. According to the kinetic molecular theory, the molecules
of an ideal gas
A)
B)
C)
D)
have a strong attraction for each other
have significant volume
move in random, constant, straight-line motion
are closely packed in a regular repeating pattern
3. The concept of an ideal gas is used to explain
A)
B)
C)
D)
the mass of a gas sample
the behavior of a gas sample
why some gases are monatomic
why some gases are diatomic
7. Equal volumes of all gases at the same temperature and
pressure contain an equal number of
A) molecules
C) electrons
B) atoms
D) protons
8. A cylinder with a movable piston contains a sample of
gas having a volume of 6.0 liters at 293 K and 1.0
atmosphere. What is the volume of the sample after the
gas is heated to 303 K, while the pressure is held at 1.0
atmosphere?
A) 9.0 L B) 6.2 L C) 5.8 L D) 4.0 L
9. Which graph represents the relationship between
pressure and volume for a sample of an ideal gas at
constant temperature?
A)
B)
4. Under which conditions of temperature and pressure
would a 1-liter sample of a real gas behave most like an
ideal gas?
A) l00 K and 0.l atm
B) 100 K and 10 atm
C) 500 K and 0.1 atm D) 500 K and 10 atm
5. Under the same conditions of temperature and
pressure, which of the following gases would
behave most like an ideal gas?
A) He(g)
C) Cl 2(g)
C)
D)
B) NH 3(g)
D) CO 2(g)
6. The table below shows data for the temperature, pressure,
and volume of four gas samples.
10. Which graph shows the pressure-temperature
relationship expected for an ideal gas?
Which two gas samples have the same total number of
molecules?
A) A and B
C) B and C
B) A and C
D) B and D
A)
B)
C)
D)
Gas Law Practice Exam
11. Base your answer to the following question on A
cylinder with a tightly fitted piston is shown in the
diagram below.
15. The volume of a sample of a gas at 0°C is 100 liters. If
the volume of the gas is increased to 200 liters at
constant pressure, what is the new temperature of the
gas in degrees Kelvin?
A) 0 K
C) 100 K
As the piston moves downward, the number of
molecules of air in the cylinder
A) decreases
C) remains the same
B) 273 K
D) 546 K
16. Base your answer to the following question on
B) increases
12. At a temperature of 273 K, a 400.-milliliter gas sample
has a pressure of 760. millimeters of mercury. If the
pressure is changed to 380. millimeters of mercury, at
which temperature will this gas sample have a volume
of 551 milliliters?
A) 100 K
C) 273 K
B) 188 K
D) 546 K
13. Which graph represents the relationship between
volume and Kelvin temperature for an ideal gas at
constant pressure?
A)
B)
The table above shows the changes in the volume of a
gas as the pressure changes at constant temperature.
Which equation best expresses the relationship between
pressure and volume for the gas?
A)
B)
C)
D)
C)
D)
17. The graph below illustrates the change in the volume of
a gas sample as its temperature rises at constant
pressure.
14. Under which conditions will the volume of a given
sample of a gas decrease?
A)
B)
C)
D)
decreased pressure and decreased temperature
decreased pressure and increased temperature
increased pressure and decreased temperature
increased pressure and increased temperature
What temperature is represented by point B?
A) 546 K B) 298 K C) 273 K D) 0 K
Gas Law Practice Exam
18. Which statement describes the particles of an ideal gas
based on the kinetic molecular theory?
A) The gas particles are relatively far apart and
have negligible volume.
B) The gas particles are in constant, nonlinear
motion.
C) The gas particles have attractive forces between
them.
D) The gas particles have collisions without
transferring energy.
19. A sample of oxygen gas is sealed in container X. A
sample of hydrogen gas is sealed in container Z. Both
samples have the same volume, temperature, and
pressure. Which statement is true?
A) Container X contains more gas molecules than
container Z.
B) Container X contains fewer gas molecules than
container Z.
C) Containers X and Z both contain the same
number of gas molecules.
D) Containers X and Z both contain the same mass of
gas.
20. Which temperature change would cause a sample of an
ideal gas to double in volume while the pressure is held
constant?
A)
B)
C)
D)
from 400. K to 200. K
from 200. K to 400. K
from 400.°C to 200.°C
from 200.°C to 400.°C
21. A gas occupies a volume of 444 mL at 273 K and 79.0
kPa. What is the final kelvin temperature when the
volume of the gas is changed to 1880 mL and the
pressure is changed to 38.7 kPa?
A) 31.5 K
C) 566 K
B) 292 K
D) 2360 K
22. The volume of a 1.00-mole sample of an ideal gas will
decrease when the
A) pressure decreases and the temperature decreases
B) pressure decreases and the temperature increases
C) pressure increases and the temperature
decreases
D) pressure increases and the temperature increases
23. When the pressure exerted on a confined gas at constant
temperature is doubled, the volume of the gas is
A) halved
C) tripled
B) doubled
D) quartered
24. A sample of gas occupies 15.0 liters at a pressure of
2.00 atmospheres and a temperature of 300. K. If the
pressure is lowered to 1.00 atmosphere and the
temperature is raised to 400. K, the volume of the gas
sample would be
A) 5.63 L
C) 22.5 L
B) 10.0 L
D) 40.0 L
Answer Key
Gas Quiz
1.
A
2.
C
3.
B
4.
C
5.
A
6.
B
7.
A
8.
B
9.
D
10.
A
11.
C
12.
B
13.
C
14.
C
15.
D
16.
B
17.
A
18.
A
19.
C
20.
B
21.
C
22.
C
23.
A
24.
D