Dalton's Partial Pressure

Calculate the partial pressure of H2 at 20oC when the vapor pressure of water is 17.5torr. The total pressure of the gases is 750torr.

• 767.5torr

• 732torr

• 42.86torr

A 250 mL sample of oxygen is collected over water at 25° C and 760.0 torr pressure. What is the pressure of the dry gas alone? (Vapor pressure of water at 25° C = 23.8 torr)

• 783.8 torr

• 205.38 torr

• 1250 torr

• 736.2 torr

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?

• 900 atm

• 0.90 atm

• 9.00 atm

• 920 atm

A container holds a mixture of two different gases. The oxygen in a container exerts 80 mmHg of pressure on the inside of the container. The total pressure inside the container is 120 mmHg. What is the pressure of the other gas in the container?

• 200 mmHg

• 80 mmHg

• 40 mmHg

• 120 mmHg

How is the partial pressure of a gas in a mixture calculated using Dalton's Law?

• By multiplying the total pressure by the volume fraction of the gas.

• By dividing the volume of the gas by the total volume of the mixture.

• By multiplying the mole fraction of the gas by the total pressure of the mixture.

• By adding the pressure of all individual gases in the mixture.

Which of the following is a direct application of Dalton's Law of partial pressures?

• Predicting the boiling point of a liquid mixture.

• Calculating the pressure inside a balloon filled with helium and oxygen.

• Determining the solubility of a gas in water at a given temperature.

• Measuring the speed of sound in air.

What real-life example best illustrates the concept of partial pressure?

• The expansion of a balloon when heated.

• The fizz produced when a soda can is opened.

• The rusting of iron in the presence of oxygen and moisture.

• The melting of ice at 0°C.

What is the total pressure of a mixture of gases where the pressure of gas 1 is 2.0 atm, the pressure of gas 2 is 1.0 atm, and the pressure of gas 3 is 0.5 atm?

• 2.5 atm

• 3.5 atm

• 0.5 atm

• 4 atm

The total pressure of a mixture of oxygen and nitrogen gas is 400.0 kPa. What is the partial pressure of nitrogen if the pressure of oxygen is 150.0 kPa?

• 400.0 kPa

• 550.0 kPa

• 250.0 kPa

• 101.3 kPa

A sample of hydrogen gas was collected over water at 20.0 ºC. The atmospheric pressure was 105.5 kPa. What is the pressure of the dry hydrogen gas?

• 17.5 mm Hg

• 105.5 KPa

• 107.8 kPa

• 103.2 kPa