Gas Laws

A student measures the pressure and volume of an empty water bottle to be 1.4 atm and 2.3 L. She then decreases the pressure to 0.65 atm. What is the new volume?

• 2.1 L

• 5.0 L

• 8.2 L

• 3.9 L

A student inflates a balloon with helium then places it in the freezer. The student should expect

• the balloon's volume to increase

• the balloon's volume to decrease

• the balloon's moles to increase

• the balloon's moles to decrease

The pressure of a 6.5 L sample of oxygen gas is measured to be 3.8 atm. If the gas is transferred into a 12 L tank, what is the new pressure?

• 6.6 atm

• 3.9 atm

• 4.5 atm

• 2.1 atm

When a piston compresses in a chamber the volume of the gas inside decreases. What happens to the pressure and which gas law is this representing?

• The pressure decreases - Charles'

• The pressure increases - Charles'

• The pressure decreases - Boyle's

• The pressure increases - Boyle's

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

• The pressure will increase

• The pressure will decrease

• The pressure will remain constant

• The pressure will equalize

What formula would you use to solve this problem?

A gas that has a pressure of 2 atm and a volume of 10 L. What would be the new volume if the pressure was changed to 1 atm?

• P1/T1 = P2/T2

• P1V1 = P2V2

• V1/n1 = V2/n2

• PV = nRT

What formula would you use to solve this question?

A sample of a gas has a volume of 852 mL at 298 K. What temperature is necessary for the gas to have a volume of 945 mL?

• Pt = P1 + P2 + P3 + ...

• P1V1 = P2V2

• V1/T1 = V2/T2

• P1V1/T1 = P2V2/T2

What formula would you use to solve this problem?

Determine the number of moles in a container of gas at STP with a volume of 99.2 L.

• V1/n1 = V2/n2

• PV = nRT

• P1/T1 = P2/T2

• V1/T1 = V2/T2

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change
• Balloon freezes to death

Which of the following would increase the (gas) pressure of a system?

• Increase the Temperature
• Pump in more gas
• Decrease the volume
• All of these