Chemistry 51 - Fundamentals of Chemistry » Fall 2021 » Chapter 8 Homework
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Question #1
Which of the following is true about gases?
A.
They take the shape of the bottom of the container.
B.
Their particles are in close contact with each other.
C.
They have no definite volume.
D.
They have strong intermolecular interactions.
E.
They have a definite shape.
Question #2
A gas that follows the "potential theory of gases" perfectly is called an ideal gas.
A.
FALSE
B.
TRUE
Question #3
If a sample of gas has an initial pressure of 4.83 atm, what is the initial volume if the pressure is increased to 10.0 atm and the volume is reduced to 10.0 L? Assume that the amount and the temperature of the gas remain constant.
A.
4.83 L
B.
20.7 L
C.
10.0 L
D.
0.207 L
E.
483 L
Question #4
Most gases show slight deviations from the "kinetic theory of gases" and are called _______ gases.
A.
definite
B.
unreal
C.
constant
D.
real
Question #5
What intermolecular forces besides dispersion forces, if any, exist in sodium chloride (NaCl)?
A.
Ionic forces
B.
Hydrogen bonding forces
C.
Nonpolar covalent forces
D.
Dipole-dipole forces
E.
Polar covalent forces
Question #6
A gas sample at a certain temperature has an initial volume of 5.345 L. What is the initial temperature of the sample if the volume and the temperature are changed to 4.345 L and 898.0 K, respectively? Assume that the pressure and the amount of the gas remain constant.
A.
38.60 K
B.
730.0 K
C.
2,730 K
D.
3,925 K
E.
1,104 K
Question #7
If the particles of a substance have enough energy to partially overcome intermolecular interactions, then the particles can move about each other while remaining in contact. This describes the _______ phase.
A.
condensation
B.
gas
C.
liquid
Question #8
Which of the following is true about solids?
A.
They have moderate intermolecular interactions.
B.
They have weak intermolecular interactions.
C.
They have a definite shape.
D.
They have an indefinite volume.
E.
Their particles are not in contact with each other.
Question #9
Determine how many millimeters of mercury are in 9.65 bar.
A.
9.64 mmHg
B.
7.33 × 103 mmHg
C.
9,640 mmHg
D.
7.24 × 103 mmHg
E.
7.43 × 103 mmHg
Question #10
1,480 mmHg = ____ torr
A.
1,947
B.
1.46
C.
1,510
D.
1,460
E.
1,480
Question #11
If the amount of gas in a sample and its temperature are kept constant, then as the pressure of a gas is increased, the volume of the gas decreases proportionately. This is one form of Boyle's law.
A.
TRUE
B.
FALSE
Question #12
Given the following conditions for a gas: Ti = 27°C, Vi = 1,260 cm3, Vf = 12.60 L. What is Tf? Assume pressure and amount remain constant.
A.
27°C
B.
2,700 K
C.
3,000 K
D.
300 K
E.
270°C
Question #13
What is the volume in liters of 1.38 mol of Ar gas at 400.0 K and 4.00 atm?
A.
2.83 L
B.
45.2 L
C.
11.3 L
D.
22.6 L
E.
0.453 L
Question #14
A particularly strong type of dipole-dipole interaction is called ____.
A.
nonpolar bonding
B.
fusion
C.
ionic bonding
D.
dispersion bonding
E.
hydrogen bonding
Question #15
A sample of xenon gas is maintained at 420 torr and 45oC occupies a volume of 420 mL. Determine the mass of the gas. (Molar mass of xenon = 131.29 g/mol.)
A.
0.17 g
B.
2.0 g
C.
0.26 g
D.
1.2 g
E.
0.51 g
Question #16
Molecules that experience no other type of intermolecular interaction will at least experience _______ forces.
A.
thermal
B.
immersion
C.
dispersion
D.
dynamic
Question #17
A sample of gas has an initial pressure of 2.50 Pa and an initial volume of 170 mL. If the pressure is reduced to 0.287 N/m2, the volume also decreases to 0.0042 L. Assume that the amount and the temperature of the gas remain constant.
A.
TRUE
B.
FALSE
Question #18
If the particles of a substance have enough energy to completely overcome intermolecular interactions, then the particles can separate from each other and move about randomly in space. This describes the solid state.
A.
TRUE
B.
FALSE
Question #19
One torr equals 760 mmHg.
A.
FALSE
B.
TRUE
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