END OF MODULE 12 REVIEW

When Pressure increases then the Volume must...

• Increase
• decrease

Which container will have a lower pressure?

• left
• right
• they both have the same pressure
• I don't know

For the problem below, what is the value for the final pressure?

A gas with a volume of 4.0 L at 90.0 kPa expands until the pressure drops to 20.0 kPa. What is its new volume if the temperature doesn’t change?

• 14.0 L

• 20.0 L

• 90.0 L

• 18.0 L

Suppose a balloon (volume 250.0 L) is inflated on a jet airplane at an altitude of 45,000 feet. The cabin of the airplane is pressurized to 0.75 atm. When the person with the balloon exits the air craft what will likely happen to the volume of the balloon? (Assume temp is same in and out of the plane).

• Stay the same since temp stays constant

• Enlarge

• Get smaller

• Unable to be predicted, too many variables.

Answer explanation

The pressure will likely increase as no air port is higher than the cruising altitude of an aircraft. So the balloon's volume will decrease with added outside pressure.

The pressure on a sample of gas is increased from 1.0 atm to 3.0 atm. If the new volume is 0.52 L, find the original volume.

• 1.25 L

• 1.56 L

• 0.173 L

• None of these is very close.

If a gas occupies a volume of 7.0 L at 273 K, what will be its volume at 473 K, assuming constant pressure?

• 4.8 L

• 6.4 L

• 8.0 L

• 12.1 L

If the volume of a gas is 4.0 L at 400 K, what will be its volume at 600 K, assuming constant pressure?

• 2.0 L

• 4.0 L

• 6.0 L

• 8.0 L

A balloon has a volume of 500 mL at a temperature of 300 K. If the temperature decreases to 150 K, what will be the new volume, assuming constant pressure?

• 250 mL

• 333 mL

• 501 mL

• 750 mL

A gas has a volume of 2.5 L at 10°C. If the temperature is increased to 100°C, what will be its new volume, assuming constant pressure?

• 1.25 L

• 3.3L

• 5.0 L

• 2.5 L

If a gas occupies a volume of 8.0 L at 300 K, what will be its volume at 400 K, assuming constant pressure?

• 4.3 L

• 10.7 L

• 12.6 L

• 16.0 L