Gases and Gas Laws

A gas at 928 kpa, 129 C occupies a volume of 569 L. Calculate the volume at 319 kpa and 32 C.

• 410.61 L

• 418.18 L

• 1255 L

• 1400 L

Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure. 

• 0 K 

• 107 K 

• 207 K 

• 307 K 

What pressure, in atm, is exerted by 2.50 L of gas containing 1.35 mol at 320 K?
PV=nRT

• 14.19 atm

• 16.53 atm

• 18.42 atm

• 22.54 atm

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.

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

What formula would you use to solve the following: A 0.562 L container of Helium has a pressure of 9.5 atm. What volume would be necessary to decrease the pressure to 2.4 atm?

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What formula would you use to solve the following: A sample of nitrogen gas was collected over water at a temperature of 23.0°C. What is the partial pressure of nitrogen if the atmospheric pressure (total) was 785 mmHg and the vapor pressure of water was 21.1 mmHg?

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Charles' Law States...

• As Pressure goes up volume goes down

• As Pressure goes up temperature goes up

• As Volume goes up temperature goes up 

• As Pressure goes down volume goes down 

True or False: Gases can be compressed. 

• True

• False

A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?

• 12.9 L

• 0.72 L

• 7.2 L

• 3.44 L