# Chapter 13: Temperature And Kinetic Theory

79 Questions | Total Attempts: 315  Settings Create your own Quiz • 1.
When the engine of your car heats up, the spark plug gap will
• A.

Increase.

• B.

Decrease.

• C.

Remain unchanged.

• D.

Decrease at first and then increase later, so that the two effects cancel once the engine reaches operating temperature.

• 2.
The coefficient of linear expansion for aluminum is 1.8 * 10^(-6) (C°)^(-1). What is its coefficient of volume expansion?
• A.

9.0 * 10^(-6) (C°)^(-1)

• B.

5.8 * 10^(-18) (C°)^(-1)

• C.

5.4 * 10^(-6) (C°)^(-1)

• D.

3.6 * 10^(-6) (C°)^(-1)

• 3.
The surface water temperature on a large, deep lake is 3°C. A sensitive temperature probe is lowered several meters into the lake. What temperature will the probe record?
• A.

A temperature warmer than 3°C

• B.

A temperature less than 3°C

• C.

A temperature equal to 3°C

• D.

There is not enough information to determine.

• 4.
Which temperature scale never gives negative temperatures?
• A.

Kelvin

• B.

Fahrenheit

• C.

Celsius

• D.

All of the above

• 5.
Which two temperature changes are equivalent?
• A.

1 K = 1 F°

• B.

1 F° = 1 C°

• C.

1 C° = 1 K

• D.

None of the above

• 6.
The temperature in your classroom is approximately
• A.

68 K.

• B.

68°C.

• C.

50°C.

• D.

295 K.

• 7.
A container of an ideal gas at 1 atm is compressed to one-third its volume, with the temperature held constant. What is its final pressure?
• A.

1/3 atm

• B.

1 atm

• C.

3 atm

• D.

9 atm

• 8.
If the pressure acting on an ideal gas at constant temperature is tripled, its volume is
• A.

Reduced to one-third.

• B.

Increased by a factor of three.

• C.

Increased by a factor of two.

• D.

Reduced to one-half.

• 9.
According to the ideal gas Law, PV = constant for a given temperature. As a result, an increase in volume corresponds to a decrease in pressure. This happens because the molecules
• A.

Collide with each other more frequently.

• B.

Move slower on the average.

• C.

Strike the container wall less often.

• D.

Transfer less energy to the walls of the container each time they strike it.

• 10.
The number of molecules in one mole of a substance
• A.

Depends on the molecular weight of the substance.

• B.

Depends on the atomic weight of the substance.

• C.

Depends on the density of the substance.

• D.

Is the same for all substances.

• 11.
A container holds N molecules of an ideal gas at a given temperature. If the number of molecules in the container is increased to 2N with no change in temperature or volume, the pressure in the container
• A.

Doubles.

• B.

Remains constant.

• C.

Is cut in half.

• D.

None of the above

• 12.
Both the pressure and volume of a given sample of an ideal gas double. This means that its temperature in Kelvin must
• A.

Double.

• B.

• C.

Reduce to one-fourth its original value.

• D.

Remain unchanged.

• 13.
The temperature of an ideal gas increases from 2°C to 4°C while remaining at constant pressure. What happens to the volume of the gas?
• A.

It decreases slightly.

• B.

It decreases to one-half its original volume.

• C.

It increases slightly.

• D.

It increases to twice as much.

• 14.
A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules at STP have
• A.

The same average molecular speeds.

• B.

The same number of molecules.

• C.

The same diffusion rates.

• D.

All of the above

• 15.
Consider two equal volumes of gas at a given temperature and pressure. One gas, oxygen, has a molecular mass of 32. The other gas, nitrogen, has a molecular mass of 28. What is the ratio of the number of oxygen molecules to the number of nitrogen molecules?
• A.

32:28

• B.

28:32

• C.

1:1

• D.

None of the above

• 16.
The average molecular kinetic energy of a gas can be determined by knowing only
• A.

The number of molecules in the gas.

• B.

The volume of the gas.

• C.

The pressure of the gas.

• D.

The temperature of the gas.

• 17.
A sample of an ideal gas is slowly compressed to one-half its original volume with no change in temperature. What happens to the average speed of the molecules in the sample?
• A.

It does not change.

• B.

It doubles.

• C.

It halves.

• D.

None of the above

• 18.
A sample of an ideal gas is heated and its Kelvin temperature doubles. What happens to the average speed of the molecules in the sample?
• A.

It does not change.

• B.

It doubles.

• C.

It halves.

• D.

None of the above

• 19.
The absolute temperature of an ideal gas is directly proportional to which of the following?
• A.

Speed

• B.

Momentum

• C.

Kinetic energy

• D.

Mass

• 20.
In order to double the average speed of the molecules in a given sample of gas, the temperature (measured in Kelvin) must
• A.

• B.

Double.

• C.

Increase by a factor of square root two of its original value.

• D.

Increase by a factor of square root three of its original value.

• 21.
Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, the average molecular kinetic energy of oxygen, compared to hydrogen
• A.

Is greater.

• B.

Is less.

• C.

Is the same.

• D.

Cannot be determined since pressure and volume are not given

• 22.
Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, how do their average molecular speeds compare? The oxygen molecules are moving
• A.

4 times faster.

• B.

At 1/4 the speed.

• C.

16 times faster.

• D.

At 1/16 the speed.

• 23.
A fixed container holds oxygen and helium gases at the same temperature. Which one of the following statements is correct?
• A.

The oxygen molecules have the greater kinetic energy.

• B.

The helium molecules have the greater kinetic energy.

• C.

The oxygen molecules have the greater speed.

• D.

The helium molecules have the greater speed.

• 24.
A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22°C. Which gas molecules have the greater average kinetic energy?
• A.

It is the same for both because the temperatures are the same.

• B.

The oxygen molecules do because they are diatomic.

• C.

The helium molecules do because they are less massive.

• D.

The helium molecules do because they are monatomic.

• 25.
A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22°C. Which gas molecules have the greater average speed?
• A.

The helium molecules do because they are monatomic.

• B.

It is the same for both because the temperatures are the same.

• C.

The oxygen molecules do because they are more massive.

• D.

The helium molecules do because they are less massive.

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