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Test Bank General Chemistry, 10th edition 1
Chapter 5 - The Gaseous State
1. Which of the following concerning a barometer or manometer is/are true?
1.
Pressure is directly proportional to the height of the liquid used in the device.
2.
Pressure is directly proportional to the density of the liquid used in the device.
3.
Pressure is independent of the acceleration of gravity.
A)
1 only
B)
2 only
C)
3 only
D)
1 and 2
E)
1, 2, and 3
2. It is possible to make a barometer using a liquid other than mercury. What would be the
height (in meters) of a column of water at a pressure of 0.390 atm, given that 0.390 atm is
equal to a 0.296 m column of mercury and the densities of mercury and water are 13.5
g/cm3 and 1.00 g/cm3, respectively.
A)
4.00 m
B)
0.250 m
C)
0.0220 m
D)
0.296 m
E)
3.37 m
3. A particular gas exerts a pressure of 621 mmHg. What is this pressure in units of bar?
A)
4.66 105 bar
B)
4.78 105 bar
C)
629 bar
D)
0.806 bar
E)
0.828 bar
4. A particular gas exerts a pressure of 785 mmHg. What is this pressure in units of
atmospheres?
A)
5.89 105 atm
B)
6.05 105 atm
C)
775 atm
D)
1.05 atm
E)
1.03 atm
5. A particular gas exerts a pressure of 2.79 bar. What is this pressure in units of pascals?
A)
2.75 105 Pa
B)
2.79 10–5 Pa
C)
2.79 105 Pa
D)
2.83 105 Pa
E)
2.75 10–5 Pa
6. A particular gas exerts a pressure of 3.43 bar. What is this pressure in units of atmospheres?
A)
3.48 atm
B)
2.57 103 atm
C)
2.64 103 atm
D)
3.39 atm
E)
3.43 atm
7. A particular gas exerts a pressure of 4.79 atm. What is this pressure in units of mmHg?
A)
4.73 mmHg
B)
3.64 103 mmHg
C)
4.85 mmHg
D)
6.30 10–3 mmHg
E)
3.69 103 mmHg
8. A particular gas exerts a pressure of 2.27 atm. What is this pressure in units of bar?
A)
1.73 103 bar
B)
2.27 105 bar
C)
2.30 bar
D)
2.24 bar
E)
2.99 10–3 bar
9. A particular gas exerts a pressure of 2.62 104 Pa. What is this pressure in units of bar?
A)
2.62 109 bar
B)
0.262 bar
C)
34.5 bar
D)
2.59 104 bar
E)
2.65 104 bar
10. A particular gas exerts a pressure of 7.54 104 Pa. What is this pressure in units of
atmospheres?
A)
0.744 atm
B)
7.44 109 atm
C)
0.764 atm
D)
0.754 atm
E)
7.64 109 atm
11. The pressure of a certain gas is measured to be 360.6 mmHg. What is this pressure
expressed in units of pascals?
A)
4.683 10–6 Pa
B)
2.136 105 Pa
C)
2.080 10–5 Pa
D)
3.654 107 Pa
E)
4.808 104 Pa
12. The pressure of a certain gas is measured to be 5.159 103 Pa. What is this pressure
expressed in units of mmHg?
A)
6.699 10–5 mmHg
B)
3.921 106 mmHg
C)
2.584 10–2 mmHg
D)
38.70 mmHg
E)
1.493 104 mmHg
13. A flexible vessel contains 47 L of gas where the pressure is 1.3 atm. What will the volume
be when the pressure is 0.85 atm, the temperature remaining constant?
A)
0.014 L
B)
31 L
C)
47 L
D)
0.046 L
E)
72 L
14. A flexible vessel contains 32.00 L of gas at a pressure of 1.59 atm. Under conditions of
constant temperature and moles of gas, what is the volume of the gas when the pressure of
the vessel is decreased by a factor of three?
A)
96.1 L
B)
10.7 L
C)
0.0104 L
D)
32 L
E)
4.80 L
15. A flexible vessel is filled to a certain pressure with 12.00 L of gas. Under conditions of
constant temperature and moles of gas, how does the volume of the gas change when the
pressure of the gas is decreased by a factor of three?
A)
The volume increases by a factor of three.
B)
The volume increases by a factor of two.
C)
The volume increases by a factor of four.
D)
The volume decreases by a factor of two.
E)
The volume decreases by a factor of four.
16. A flexible vessel contains 53 L of gas where the pressure is 1.6 atm. What will the volume
be when the pressure is 0.61 atm, the temperature remaining constant?
A)
0.007 L
B)
20 L
C)
53 L
D)
0.042 L
E)
139 L
17. A 2.00-L glass soda bottle filled only with air is tightly capped at 24°C and 744.0 mmHg. If
the bottle is placed in water at 75°C, what is the pressure in the bottle?
A)
238 mmHg
B)
872 mmHg
C)
2330 mmHg
D)
635 mmHg
E)
383 mmHg
18. A sample of methane, CH4, occupies a volume of 170.0 mL at 25°C and exerts a pressure of
965.0 mmHg. If the volume of the gas is allowed to expand to 720.0 mL at 298 K, what will
be the pressure of the gas?
A)
4090 mmHg
B)
2720 mmHg
C)
227.8 mmHg
D)
0.008823 mmHg
E)
550.0 mmHg
19. When the valve between the 2.00-L bulb, in which the gas pressure is 3.00 atm, and the
3.00-L bulb, in which the gas pressure is 2.50 atm, is opened, what will be the final pressure
in the two bulbs? Assume the temperature remains constant.
A)
2.70 atm
B)
5.50 atm
C)
2.83 atm
D)
2.80 atm
E)
2.67 atm
20. Absolute zero is the point at which
A)
a straight-line graph of V versus T (C) intersects the origin.
B)
a straight-line graph of 1/V versus P at constant T intersects the origin.
C)
gaseous helium liquefies.
D)
a straight-line graph of V versus 1/P at constant T intersects the origin.
E)
a straight-line graph of V versus T (K) intersects the origin.
21. The following volume-temperature plots were made at different values of constant pressure
while the number of moles of gas in each experiment remained the same. Which plot
represents measurements at the highest pressure?
A)
B
B)
C
C)
A
D)
They are all at the same pressure.
E)
D
22. Which of the following is a correct statement of Charles’s law, ?
A)
The volume of a gas varies proportionally with the pressure.
B)
The volume of a gas sample varies directly with the absolute temperature.
C)
All gas samples of the same volume at STP contain the same number of atoms.
D)
The pressure of a gas sample varies inversely with the volume.
E)
All gas samples of the same volume at STP contain the same number of molecules.
Test Bank General Chemistry, 10th edition 7
23. The volume of a sample of gas measured at 55.0°C and 1.00 atm pressure is 8.00 L. What
must the final temperature be in order for the gas to have a final volume of 9.00 L at 1.00
atm pressure?
A)
96.0°C
B)
61.9°C
C)
–211.1°C
D)
48.9°C
E)
18.6°C
24. A flexible container is charged with 51.00 L of gas at 368 . Under conditions of constant
pressure and moles of gas, what is the volume of the gas when the temperature is tripled?
A)
153 L
B)
17.0 L
C)
0.0588 L
D)
51 L
E)
0.850 L
25. A flexible container is charged with a certain volume of gas at 318.3 . Under conditions of
constant pressure and moles of gas, how does the volume of the gas change when the
temperature is decreased by a factor of four?
A)
The volume decreases by a factor of four.
B)
The volume decreases by a factor of two.
C)
The volume remains the same.
D)
The volume increases by a factor of three.
E)
The volume increases by a factor of two.
26. A gas occupies a volume of 2.75 L at 350 mmHg and 200°C. Which mathematical
expression gives the correct volume at 550 mmHg and 450°C?
A)
B)
C)
Test Bank General Chemistry, 10th edition 8
D)
E)
27. A gas occupying a volume of 1.50 L exerts a pressure of 700 mmHg at 200°C. Which
mathematical expression gives the correct pressure at 6.00 L and 400°C?
A)
B)
C)
D)
E)
28. A rigid container is charged with a gas to a pressure of 760 mmHg at 20.0°C and tightly
sealed. If the temperature of the gas increases by 40.0°C what is the new pressure?
A)
1520 mmHg
B)
669 mmHg
C)
656 mmHg
D)
864 mmHg
E)
1140 mmHg
29. The pressure of 4.2 L of nitrogen gas in a flexible container is decreased to one-half its
original pressure, and its absolute temperature is increased to double the original
temperature. The volume is now
A)
2.1 L.
B)
4.2 L.
C)
8 L.
D)
17 L.
E)
1.1 L.
Test Bank General Chemistry, 10th edition 9
30. Which of the following concerning the ideal gas law is/are true?
1.
Pressure is directly proportional to volume when temperature and moles of
gas are held constant.
2.
Pressure is directly proportional to moles of gas when temperature and
volume are held constant.
3.
Volume is inversely proportional to temperature when the pressure and moles
of gas are held constant.
A)
1 only
B)
2 only
C)
3 only
D)
1 and 2 only
E)
2 and 3 only
31. A given mass of gas occupies a volume of 4.00 L at 60°C and 550 mmHg. Which of the
following mathematical expressions will yield its temperature at 3.00 L and 775 mmHg?
A)
B)
C)
D)
E)
32. A fixed amount of gas in a rigid container is heated from 300 to 900 K. Which of the
following responses best describes what will happen to the pressure of the gas?
A)
The pressure will increase by a factor of 3.
B)
The pressure will increase by a factor less than 3.
C)
The pressure will increase by a factor greater than 3.
D)
The pressure will decrease by a factor of 3.
E)
The pressure will remain the same.
Test Bank General Chemistry, 10th edition 10
33. A 22.4-L sample of nitrogen at 3.65 atm and 22°C is simultaneously expanded to 57.4 L and
heated to 38°C. What is the new pressure of the gas?
A)
2.46 atm
B)
1.50 atm
C)
204 atm
D)
334 atm
E)
1.35 atm
34. A fixed amount of gas in a rigid container is heated from 100°C to 700°C. Which of the
following responses best describes what will happen to the pressure of the gas?
A)
The pressure will increase by a factor greater than 7.
B)
The pressure will increase by a factor of 7.
C)
The pressure will increase by a factor less than 7.
D)
The pressure will decrease by a factor of 7.
E)
The pressure will remain the same.
35. Equal volumes of propane, C3H8, and carbon monoxide, CO, at the same temperature and
pressure have the same
A)
chemical properties.
B)
number of atoms.
C)
average molecular speed.
D)
density.
E)
number of molecules.
36. A 1.00-L bulb contains a sample of O2 at 25°C and 1.00 atm pressure. A second 1.00-L bulb
contains a sample of CH4 at 25°C and 1.00 atm pressure. What is the ratio of the number of
molecules of methane to the number of molecules of oxygen in each of the containers?
A)
2:5
B)
C)
5:2
D)
E)
1:1
Test Bank General Chemistry, 10th edition 11
37. Which of the following statements, concerning equal volumes of the gases dinitrogen
monoxide, N2O, and propane, C3H8, at the same temperature and pressure, is not correct?
A)
The moles of N2O and C3H8 are equal.
B)
They have the same density.
C)
They have the same number of molecules.
D)
They have the same number of atoms.
E)
They have the same absolute temperature.
38. What volume of methane gas, CH4, has the same number of atoms as 6.00 L of krypton gas
at the same temperature and pressure?
A)
36.0 L
B)
1.00 L
C)
6.00 L
D)
1.20 L
E)
30.0 L
39. What volume of gaseous water, H2O, has the same moles of gas as 10.0 L of xenon gas at
the same temperature and pressure?
A)
40.0 L
B)
2.50 L
C)
10.0 L
D)
3.33 L
E)
30.0 L
40. A gas occupies a volume of 2.00 L at 860 mmHg and 30.0°C. Which of the following
mathematical expressions will yield its volume at STP?
A)
B)
C)
Test Bank General Chemistry, 10th edition 12
D)
E)
41. Which conditions of P, T, and n, respectively, are most ideal?
A)
low P, low T, low n
B)
high P, low T, high n
C)
low P, high T, high n
D)
low P, high T, low n
E)
high P, high T, high n
42. The behavior of PH3(g) is most likely to approach ideal behavior at
A)
1.0 atm and 100°C.
B)
0.10 atm and –100°C.
C)
10 atm and 100°C.
D)
0.10 atm and 100°C.
E)
1.0 atm and 0°C.
43. For an ideal gas, which of the following statements is true?
A)
V is inversely proportional to n at constant P and T.
B)
P is inversely proportional to T at constant n and V.
C)
P is inversely proportional to n at constant V and T.
D)
P is inversely proportional to V at constant n and T.
E)
V is inversely proportional to T at constant n and P.
44. The volume of 1 mol of nitrogen
A)
is lower than that of 1mol ammonia at high pressures.
B)
is decreased by decreasing the pressure of the gas.
C)
has the value of 22.4 L at 0°C and 1.00 atm.
D)
is decreased by increasing its kinetic energy.
E)
is increased by decreasing the temperature.
45. Which of the following graphs does not correctly describe the ideal gas law?
A)
B)
They all correctly represent the ideal gas law.
C)
D)
E)
46. What is the pressure of a 59.6-L gas sample containing 3.01 mol of gas at 44.9°C?
(R = 0.0821 L • atm/(K • mol), 1 atm = 760 torr)
A)
1.41 102 mmHg
B)
1.73 10–3 mmHg
C)
1.32 mmHg
D)
1.00 103 mmHg
E)
5.77 102 mmHg
47. How many moles of gas are in a gas sample occupying 0.738 L at 135 mmHg and 30°C?
A)
190 mol
B)
4.01 mol
C)
40.5 mol
D)
0.00527 mol
E)
0.000433 mol
48. How many moles of gas are in a gas sample occupying 1.48 L at 591 mmHg and 302 K?
A)
35.3 mol
B)
0.0464 mol
C)
21.5 mol
D)
0.00381 mol
E)
2.90 mol
49. Which of the following statements is incorrect regarding a 320-g sample of gaseous sulfur
dioxide at 0°C and 760 mmHg pressure?
A)
The density of the gas is 2.86 g/L.
B)
There are 5 6.02 1023 atoms of oxygen present.
C)
There are 5 mol of gas present.
D)
The molar mass of the gas is 64 g/mol.
E)
The volume of the gas is 112.1 L.
50. The following gases are stored in identical flexible containers at 25C and 1.00 atm
pressure. Order the gases from highest to lowest density.
1.
200 g propane, C3H8
2.
100 g carbon dioxide, CO2
3.
50 g nitrous oxide, N2O
A)
1 2 3
B)
3 > 2 > 1
C)
1 > 2 > 3
D)
2 > 1> 3
E)
1 > 2 3
51. Which of the following samples has the fewest moles of gas?
A)
1.00 L of CH4 at 10°C and 1.00 atm
B)
1.00 L of Ar at –10.0°C and 1.00 atm
C)
1.00 L of NH3 at STP
D)
1.00 L of H2 at 0.0°C and 1.56 atm
E)
1.00 L of HCl at 30°C and 1.00 atm
52. A 3.80-L cylinder contains 6.83 g of methane, CH4, at a pressure of 3320 mmHg. What is
the temperature of the gas?
A)
475 C
B)
202 C
C)
748 C
D)
3240 C
E)
–62.4 C
53. The number of molecules in 1.0 L of air at 0°C and 1.0 atm pressure is
A)
between 1020 and 1021.
B)
between 1023 and 6 1023.
C)
between 1022 and 1023.
D)
less than 1020.
E)
between 1021 and 1022.
54. A mixture consisting of 0.120 mol N2, 0.018 mol O2, 0.112 mol CH4, and an unknown
amount of CO2 occupies a volume of 9.04 L at 25°C and 1.17 atm pressure. How many
moles of CO2 are there in this sample?
A)
0.750 mol
B)
0.182 mol
C)
2.06 mol
D)
4.90 mol
E)
0.432 mol
55. Which of the following gases has the greatest density at 2.5 atm and 25°C?
A)
C3H8
B)
SO2
C)
N2O
D)
O2
E)
NF3
56. The density of ethane, C2H6 (30.1 g/mol), at 32°C and 1.31 atm pressure is
A)
1.57 g/L.
B)
19.2 g/L.
C)
1.34 g/L.
D)
0.635 g/L.
E)
0.162 g/L.
57. The density of O2 gas at 4°C and 1.57 atm is
A)
153 g/L.
B)
35.2 g/L.
C)
2.21 g/L.
D)
68.8 g/mL.
E)
0.453 g/L.
