This page requires JavaScript, which you
don't seem to have. Please try a different browser.

Scroll through the page to review your answers. The correct answer is
highlighted in
green.
Your incorrect answers (if any) are highlighted in
red.
If you'd like to take the test over again, click the reset button at the end of the test.

Which of the following is a correct interpretation of the ideal gas law?

(A)

nPV =

(B)

nPV =

(C)

= PT

(D)

=

What is the correct relationship between
v_{rms}
,
, and
v_{p}
?

(A)
v_{rms} = = v_{p}

(B)
< v_{p}≤v_{rms}

(C)
v_{p} < < v_{rms}

(D)
v_{rms} < < v_{p}

An isolated container of gas doubles in pressure and triples in volume. By what factor does T change?

(A)
2

(B)
3

(C)
6

(D)
-6

If the volume of a gas is doubled at constant temperature, the factor by which the pressure increases is:

(A)
2

(B)
1

(C)

(D)

A barometer filled with an unknown liquid has a height of 1 m at 1 atm. During stormy weather, the height
of the column is observed to rise to 1.3 m. What is the atmospheric pressure?

(A)
atm

(B)
1.3 atm

(C)
1 atm

(D)
Cannot be determined

Which of the following are possible units of R?

(A)

(B)

(C)

(D)

You take a reading of 760 mm of Hg at 0 degrees Celsius. However, you realize that the volume at the top
of the barometer is not a complete vacuum. There is some Hg vapor above the Hg column! If the
pressure of Hg is 10 mm Hg, what is the actual atmospheric pressure?

(A)
770 mm Hg

(B)
760 mm Hg

(C)
750 mm Hg

(D)
Cannot be determined

What are the conditions of STP?

(A)
1 bar, 273 K

(B)
1 bar, 298 K

(C)
1.013×10^{5}Pa
, 298 K

(D)
1.013×10^{5}Pa
, 273 K

A container contains 32 grams of
O_{2}
gas and 2 grams of
H_{2}
gas. If the total pressure of the vessel
is 16 atm, what is the partial pressure of the
H_{2}
gas?

(A)
1 atm

(B)
2 atm

(C)
8 atm

(D)
10 atm

As the average radius of a population of gas molecules increases, how does the factor b of van der Waals
equation change?

(A)
Increase

(B)
Stay the same

(C)
Decrease

(D)
Depends on identity of the gas

All of the following are properties of an ideal gas except:

(A)
Easily compressible

(B)
Individual molecules are assumed to have no volume.

(C)
Individual molecules exert attractive forces on one another.

(D)
Fills any container in which it is placed

The ideal gas law is most valid under these conditions:

(A)
High temperature, high pressure

(B)
High temperature, low pressure

(C)
Low temperature, low pressure

(D)
Low temperature, high pressure

The reaction

N_{2} +2O_{2}→2NO_{2}

1 mol of
N_{2}
and 2 mol
O_{2}
react completely in an isolated, rigid container with initial pressure 1
atm. The temperature does not change. What is the pressure inside the container after the reaction has
gone to completion?

(A)
1 atm

(B)
3/2 atm

(C)
2/3 atm

(D)
5/2 atm

There are 4.0 mol of gas a in container A at 1.0 atm and 273 K. There are 2.0 mol of gas b in container B
at 2.0 atm and 273 K. What is the total volume of containers A and B?

(A)
130 L

(B)
90 L

(C)
110 L

(D)
22.4 L

Is the equation for:

(A)
v_{p}

(B)
v_{rms}

(C)

(D)
None of the above

For the van der Waals equation:

(P + )(V - nb) = nRT

The value "b" corrects for:

(A)
The volume occupied by the gas molecules

(B)
Inelastic collisions between gas molecules

(C)
Intermolecular attractions

(D)
The Boltzmann constant

For the equation
PV = nRT
, the value of T must be expressed in:

(A)
Degrees Celsius

(B)
Degrees Fahrenheit

(C)
Only positive values of degrees Fahrenheit

(D)
An absolute temperature scale

Which of the following is not a SI unit

(A)
Kilograms

(B)
Atmospheres

(C)
Newtons

(D)
Kelvin

A sample of gas has a volume of 22.4 L at a temperature of 273 K. How many moles are in the sample?

(A)
2.0

(B)
1.0

(C)
0.50

(D)
Cannot be determined from the information given.

The volume of a sample of gas expands five times at constant pressure. By what factor has the absolute
temperature changed?

(A)
1/5

(B)
1

(C)
5

(D)
Cannot be determined from the information given

The following reaction produces
H_{2}O
gas:

2H_{2} + O_{2}→2H_{2}O

64.0 g of O_2 are used and an excess of
H_{2}
, and the reaction goes to completion. How many liters of
H_{2}O
gas will be generated if the pressure is 2.0 atm and the temperature is 273 K?

(A)
64 L

(B)
22 L

(C)
45 L

(D)
11 L

A sample of gas occupies 100 L at STP. If the absolute temperature is halved while all other conditions are
constant, what will be the final volume?

(A)
50 L

(B)
100 L

(C)
150 L

(D)
200 L

Calculate the
v_{rms}
of a sample of
O_{2}
at 300 K.

(A)
484 m/s

(B)
242 m/s

(C)
141 m/s

(D)
9.8 m/s

A closed jar contains 2 moles of
O_{2}
and 3 moles of
N_{2}
. What is the ratio of the partial pressure of
the
O_{2}
over the total pressure in the jar?

(A)
0.1

(B)
0.2

(C)
0.4

(D)
0.6

The rate of effusion of gas A is four times that of gas B. What is
?

(A)
1/16

(B)
1/2

(C)
2

(D)
16

The Hg containing dish of the barometer is replaced with one four times its diameter. By what factor does
H
change?

(A)
1/2

(B)
2

(C)
4

(D)
H
does not change.

The density of a certain gas at STP is 1.43 g/L. What is the identity of the gas?

(A)
H_{2}

(B)
O_{2}

(C)
CO_{2}

(D)
Cl_{2}

One end of a mercury manometer is open to the atmosphere (
P_{a}tm = 760mmHg
). The other end is
connected to a 1 mol sample of
CH_{4}
that is at 273 K and occupies 22.4 L. What is the height of the
mercury column?

(A)
760 mm

(B)
560 mm

(C)
120 mm

(D)
0 mm Hg

The Maxwell-Boltzmann distribution graph plots:

(A)
Pressure vs. Volume

(B)
Mean free path vs. time

(C)
Mean free path vs. velocity

(D)
The velocity distribution of a population of gas molecules.

James the giant has big shoes to fill. His shoes have a total area of
20m^{2}
in contact with the ground.
Unfortunately, James' feet are not so big. Barefoot, his weight is spread over
1m^{2}
. What is the ratio of
the pressure he exerts on the ground barefoot over the pressure he exerts with his shoes on?

(A)
40

(B)
20

(C)
10

(D)
1/20

The "air" in airbags is generated via the decomposition of solid
NaN_{3}
:

2NaN_{3}→2Na + 3N_{2}

2/3 mole of solid
NaN_{3}
are completely decomposed at a temperature of 300 K. In order for the final
pressure in the airbag to be 1.2 atm, what must the final volume of the bag be in L? Assume that the Na
takes up no appreciable volume.
R = 0.0821
.

(A)
11 L

(B)
15 L

(C)
21 L

(D)
34 L

A sample of an ideal gas is compressed at constant temperature. What happens to the average
kinetic energy of the molecules?

(A)
The molecules bounce into the walls more often. Thus average kinetic energy decreases.

(B)
When in a confined space, molecules move slower. Average kinetic energy decreases.

(C)
Average kinetic energy is solely dependent on pressure. As pressure rises, so does the average kinetic
energy.

(D)
Average kinetic energy is solely dependent on temperature. The temperature does not change, so the
average kinetic energy stays constant.

A piston compresses a gas at constant temperature. Initially the gas occupied 1 L and was at a pressure of 1
atm. After compression, the gas occupies 0.1 atm. What is the pressure of the compressed gas?

(A)
0.1 atm

(B)
1 atm

(C)
10 atm

(D)
100 atm

A collaborator from a foreign country reports that the value of
R
as
8
. He
has probably used units of "woozle" for which of the following variables:

(A)
Pressure

(B)
Volume

(C)
Temperature

(D)
Mole fraction

Avogadro's number is:

(A)
8.314

(B)
0.0821

(C)
1.38×10^{-23}

(D)
6.02×10^{23}

What is

if both samples of gas are at the same temperature?

(A)
2

(B)

(C)
1/2

(D)

The following Maxwell-Boltzmann distribution plot was measured for two gases A and B at the same
temperature:

Which gas has the greater molecular mass?

(A)
Gas A

(B)
Gas B

(C)
Their molecular masses are equal

(D)
Cannot be determined

A rigid container holds a mixture of gases. Within this mixture, the partial pressure of
O_{2}
is 400 torr.
If an additional quantity of
N_{2}
gas is injected into the container such that the total pressure of the
container rises by 760 torr, what is the change in the partial pressure of
O_{2}
? Assume that the
temperature of the container's contents stays constant.

(A)
- 100 torr

(B)
0 torr

(C)
+ 100 torr

(D)
+ 760/400 torr

If the pressure of a gas doubles and the temperature quadruples, by what factor does the volume change?

(A)
1/2

(B)
1

(C)
2

(D)
4

Which of the following are possible units for pressure?

(A)

(B)

(C)

(D)

The following Maxwell-Boltzmann distribution plot was measured for a gas at two temperatures A and B:

What is the relationship between A and B?

(A)
A > B

(B)
A < B

(C)
A = B

(D)
Cannot be determined

For the following calculation of
v_{rms}
, the molar mass (MM) should be expressed in what units?

v_{rms}

=

=

sqrt

(A)
lb/mol

(B)
g/mol

(C)
kg/mol

(D)
slugs/mol

By what significant numerical value are Boltzmann's constant (k) and the gas constant (R) related?

(A)
The acceleration due to gravity g

(B)
The speed of light, c

(C)
Avogadro's number,
N_{A}

(D)
The mass of a single C-12 atom

The pressure of a gas is tripled while the volume is halved. By what factor does the temperature increase?

(A)
1/2

(B)
2/3

(C)
3/2

(D)
2

The gas constant R:

(A)
Is unitless

(B)
Varies with varying temperature, pressure, and volume.

(C)
Is the foundation of Charle's law

(D)
Has units of (pressure * volume) over (mol * absolute temperature)

One end of a manometer is sealed off to a vacuum. The other end of the manometer is connected to a
pressurized gas. The height of the liquid column is indicative of:

(A)
The atmospheric pressure

(B)
The pressure of the gas

(C)
The difference between the atmospheric pressure and the pressure of the gas

(D)
The dimensions of this particular manometer

A sample of
O_{2}
and a sample of
N_{2}
both have a temperature of 330 K. What is the ratio of the
average kinetic energy of the
O_{2}
over that of the
N_{2}
?

(A)
28/32

(B)
1

(C)
32/28

(D)
Cannot be determined

The density of a gas at STP is 0.089 g/L. What is the molar mass of the gas?

(A)
4.0 g/mol

(B)
2.0 g/mol

(C)
1.0 g/mol

(D)
Cannot be determined from the given data

The following Maxwell-Boltzmann distribution plot was measured for two gases A and B at temperatures
T_{A}
and
T_{B}
:

Which gas has the greater molar mass?

(A)
Gas A

(B)
Gas B

(C)
MM Gas A = MM Gas B

(D)
Cannot be determined from the given data

Gaseous methane (
CH_{4}
) burns completely in gaseous oxygen to produce carbon dioxide gas and water
vapor.

CH_{4} +2O_{2}→CO_{2} + 2HOH

2 mole of
CH_{4}
and 4 moles of
O_{2}
completely react in a closed vessel. If temperature and volume
are constant, by what factor will pressure increase?