Partial Pressures and Combined Gas Law

A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

Tags

NGSS.MS-PS1-4

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.

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

Which equation represents Dalton's Law?

• E = mc²

• PV = nRT

• P1 / T1 = P2 / T2

• P_total = P1 + P2 + P3

In a mixture of gases, each gas contributes to the total pressure. The individual contribution of each gas is known as the _________________.

• partial volume

• partial pressure

• molar mass

• mole ratio

What is the total pressure of the heliox gas in the diagram?

• 300 kPa

• 100 kPa

• 400 kPa

• 500 kPa

In what direction(s) does air exert pressure?

• everywhere
• no where
• there is no pressure
• downward

Tags

NGSS.MS-ESS2-6

Combined Gas Law: If I initially have 4.0 L of a gas at a pressure of 1.1 atm, what will the volume be if I increase the pressure to 3.4 atm?

• 1.29 L

• 12.36 L

• 1.29 atm

• 12.36 atm

Combined Gas Law:If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

• 1.8 atm

• 3.27 atm

• 1.8 L

• 3.27 atm

Combined Gas Law: A sample of nitrogen occupies a volume of 250 mL at 25^oC. What volume will it occupy at 95^oC?

• 308.70 mL

• 456.1 mL

• 308.70^oC

• 456.1^oC