Gases Review

At a constant pressure, the volume decreases.  What happens to the temperature?

• increases
• decreases
• stays the same

At a constant volume, the pressure increases.  What happens to the temperature?

• increases
• decreases
• stays the same

At a constant temperature, the volume decreases.  What happens to the pressure?

• increases
• decreases
• stays the same

A 2.00 L sample of pure oxygen gas (O₂) is measured at STP.  How many moles of oxygen is this?

• 24.4 mol
• 0.007 mol
• 1.44 mol
• 0.09 mol

• 10.4 atm
• 2920 atm
• 2916.7 atm
• 28.8 atm

Calculate the volume that a 0.323-mol sample of a gas will occupy at -8^oC and a pressure of 0.900 atm. (R = 0.0821)

• 8.18 L 

• 7.81 L
• 4.63 L
• 5.36 L

The volume of a gas is increased from 150.0 mL to 350.0 mL by heating it. If the original temperature of the gas was 25^oC, what will its final temperature be (in ^oC)

• 146 ^oC
• 10.7 ^oC
• 58.3 ^oC
• 422 ^oC

Diffusion is

• the ability of one gas to mix with another gas.
• the rate at which a gas flows through the air.
• an explosion of gases.
• the ability of a gas to move from a high pressure to a low pressure.

Which of the following is NOT a part of Kinetic Molecular Theory?

• Gas particles have mass and occupy space (the individual particles have volume)
• Gas particles do not have mass and occupy space (the individual particles have volume
• Gas particles move in straight lines
• The more heat energy the gas particles have, the faster they move

According to ___________, if you decrease the volume of a container of gas and hold the temperature constant, the pressure of the gas will increase.

• Bernoulli's principle

• Boyle's Law

• Charles's Law

• Archimedes' principle