Gas Laws

If 4 gases in a cylinder each exert a pressure of 4 atm, what is the total pressure in the cylinder?
1. 4 atm
2. 1 atm
3. 16 atm
4. 8 atm
A sample of air has a volume of 140.0 mL at 67°C. At what temperature will its volume be 50.0 mL at constant pressure?
1. 121 K
2. -152 K
3. 121°C
4. 152°C
Why would the pressure in a container of gas rise 2.56 kPa? (Temperature remains the same)
1. The volume of the container increased.
2. The volume of the container decreased
3. The container leaks
4. This can't happen
A sample of gas at 47°C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107°C and 0.789 atm?
1. 3.41 L
2. 4.31 L
3. 2.06 L
4. 1.10 L
If temperature of a fixed quantity of gas increases, and the pressure remains unchanged,
1. volume increases
2. volume decreases
3. density increases
4. density decreases
What is the partial pressure of oxygen collected by water displacement if the water temperature is 20.0°C and the total pressure of the gases in the collection bottle is 730.0 mm? (NOTE: P_water at 20.0°C = 17.5 mm Hg)
1. 712.5 mm Hg
2. 699.8 mm Hg
3. 17.5 mm Hg
4. 747.5 mm Hg
A sample of hydrogen at 47°C exerts a pressure of 0.329 atm. The gas is heated to 77°C at constant volume. What will its new pressure be?
1. 0.360 atm
2. 1.923 atm
3. 0.54 atm
4. 2.01 atm
Assuming temperature remains constant, how can you decrease the pressure of a gas?
1. decrease the mass of the gas molecules
2. decrease the size of the container
3. increase the rate of diffusion of gas molecules
4. increase the number of gas molecules in the container
A 350 mL sample of air collected at 35°C has a pressure of 550 torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?
1. 485 torr
2. 40.4 torr
3. 7940 torr
4. 166.1 torr
Who came up with the law of partial pressure?
1. Dalton
2. Boyle
3. Cecere
4. Gay-Lussac
A gas has a volume of 200 mL and a pressure of 350 torr. If temperature is constant, what is the new volume of the gas at 700 torr?
1. 100 mL
2. 400 mL
3. 300 mL
4. 50 mL
What is 23°C expressed in Kelvin?
1. 296 K
2. 250 K
3. -250 K
4. 0 K
To what temperature must a sample of nitrogen at 27°C and 0.625 atm be taken so that its pressure becomes 1.125 atm at constant volume?
1. 540 K
2. 267 K
3. -267 K
4. 540°C
Why does the pressure increase inside a car tire after it is driven for a while?
1. the temperature increases
2. The atmosphere compresses the tire.
3. the volume of the tire decreases
4. the air particles in the tire increase in speed
The pressure inside a container increases when
1. the number of gas molecules decreases
2. the temperature is decreased
3. the number of gas molecules increases
4. when the volume increases and temperature decreases
To correct for the partial pressure of water vapor, the vapor pressure of H₂0 at the collecting temperature is
1. divided by 22.4
2. subtracted from the total pressure
3. multiplied by 22.4
4. added to the total gas pressure
If you want to study the relationship between temperature and pressure of a gas, which factor must be held constant?
1. volume
2. kinetic energy
3. fluidity
4. elasticity
The normal respiratory rate for a human being is 15.0 breaths per minute. The averge volume of air for each breath is 505 cm³ at 20°C and 9.95 X 10⁴ Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters).
1. 9.98 m³
2. 1.02 m³
3. 485 m³
4. 166 m³
Which of the following is NOT standard pressure?
1. 760 torr
2. 1 atm
3. 760 mmHg
4. 10.3 kPa
What is STP?
1. 0 K and 760 mm Hg
2. 273 K and 101.3 kPa
3. 273°C and 760 torr
4. 0°C and 760 atm

Gas Laws

Multiple-Choice ExerciseContent © 2006 Melanie Cecere; Authors of Activity: Melanie Cecere & Tami Maloney; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.

If 4 gases in a cylinder each exert a pressure of 4 atm, what is the total pressure in the cylinder?

A sample of air has a volume of 140.0 mL at 67°C. At what temperature will its volume be 50.0 mL at constant pressure?

Why would the pressure in a container of gas rise 2.56 kPa? (Temperature remains the same)

A sample of gas at 47°C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107°C and 0.789 atm?

If temperature of a fixed quantity of gas increases, and the pressure remains unchanged,

What is the partial pressure of oxygen collected by water displacement if the water temperature is 20.0°C and the total pressure of the gases in the collection bottle is 730.0 mm? (NOTE: Pwater at 20.0°C = 17.5 mm Hg)

A sample of hydrogen at 47°C exerts a pressure of 0.329 atm. The gas is heated to 77°C at constant volume. What will its new pressure be?

Assuming temperature remains constant, how can you decrease the pressure of a gas?

A 350 mL sample of air collected at 35°C has a pressure of 550 torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?

Who came up with the law of partial pressure?

A gas has a volume of 200 mL and a pressure of 350 torr. If temperature is constant, what is the new volume of the gas at 700 torr?

What is 23°C expressed in Kelvin?

To what temperature must a sample of nitrogen at 27°C and 0.625 atm be taken so that its pressure becomes 1.125 atm at constant volume?

Why does the pressure increase inside a car tire after it is driven for a while?

The pressure inside a container increases when

To correct for the partial pressure of water vapor, the vapor pressure of H20 at the collecting temperature is

If you want to study the relationship between temperature and pressure of a gas, which factor must be held constant?

The normal respiratory rate for a human being is 15.0 breaths per minute. The averge volume of air for each breath is 505 cm3 at 20°C and 9.95 X 104 Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters).

Which of the following is NOT standard pressure?

What is STP?

Multiple-Choice Exercise
Content © 2006 Melanie Cecere; Authors of Activity: Melanie Cecere & Tami Maloney; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.

What is the partial pressure of oxygen collected by water displacement if the water temperature is 20.0°C and the total pressure of the gases in the collection bottle is 730.0 mm? (NOTE: P_water at 20.0°C = 17.5 mm Hg)

To correct for the partial pressure of water vapor, the vapor pressure of H₂0 at the collecting temperature is

The normal respiratory rate for a human being is 15.0 breaths per minute. The averge volume of air for each breath is 505 cm³ at 20°C and 9.95 X 10⁴ Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters).