Dalton's Law of Partial Pressures and Vapor Pressure

Dalton's Law states...

• that at a constant temperature the volume of a confined ideal gas varies inversely with its pressure.
• that the total pressure exerted by the mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases
• how gases tend to expand when heated
• that the density of an ideal gas at constant pressure varies inversely with the absolute temperature of the gas.

Which equation represents Dalton's Law?

• e=mc2
• PV=nRT
• P1/T1=P2/T2
• Ptotal=P1, P2, P3...

Three gases, Ar, N₂ and H₂ are mixed in a 500L container. Ar has a pressure of 255 torr, N₂ has a pressure of 228torr and H₂ has pressure of 752torr. What is the total pressure in the container?

• 483torr

• 270torr

• 1235torr

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

• 767.5torr

• 732torr

• 42.86torr

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?

• 2 atm
• 4 atm
• 3 atm
• 9 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 mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 mmHg and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?

• 234 mmHg
• 1.37 mmHg
• 2.64 mmHg
• 1, 494 mmHg

What does STP stand for?

• Standard Temperature and Pressure
• 1.0 mmHg and 273 degree Kelvin
• 1.0 degree Celcius and 0 atm
• 1.0 atm 273 degree Celcius

How many kPa are in 390 torr?

• 51,983 kPa
• .51 kPa
• 296,400 kPa 
• 52 kPa