CK-12-Chemistry Intermediate

14.1. Gas Properties http://www.ck12.org

FIGURE 14.6

An increase in the temperature of an en-

closed gas causes the pressure to in-

crease. If the Kelvin temperature is dou-

bled, the pressure doubles.

Lesson Summary

• Gases are compressible because of the large amounts of empty space between the particles.


• The condition of a gas sample can be described by four variables: pressure, volume, temperature, and amount
  of gas. The pressure of an enclosed gas will increase if the amount of gas is increased, the volume is decreased,
  or the temperature is increased.

Lesson Review Questions

Reviewing Concepts

1. Why are gases easy to compress? Why are solids and liquids difficult to compress?


2. Compare the characteristics of a rigid container and a flexible container. Explain how each type of container
   would respond if more gas is added to it.


3. The amount of gas in a rigid container is tripled. What happens to the gas pressure?


4. The volume of a rigid container is reduced to one fourth of its original size. What happens to the pressure of
   the gas inside?


5. The Kelvin temperature of the gas in a rigid container is increased by a factor of 10. How does the pressure
   inside the container change?


6. Explain what happens to a basketball if it is taken outside and used on a cold winter day.

Problems

7. A student places a small amount of water in an empty aluminum can and heats it until the water is boiling.
   Then she quickly turns the can upside down and plunges it into a cold-water bath. The can immediately
   collapses inward. Describe this experiment according to the kinetic-molecular theory.