Kinetic Molecular Theory

​Kinetic Molecular Theory Review

1. ​Gases consist of tiny particles (atoms or molecules)

   ​

2. The particles are in constant random motion, colliding with the walls of the container. These collisions are elastic because no energy is lost as particles collide.​

   ​

3. The average kinetic energy of the gas particles is directly proportional to the Kelvin temperature of the gas. If temperature increase the kinetic energy will increase (more faster). If temperature decreases the kinetic energy will decrease (move slower).

The kinetic molecular theory also describes how gases ​move.

• Compression: gases can be compressed (reduce volume)

• Expansion: when volume is increase gases spread and expand

• Diffusion: the random motion of gases cause a mixture of particles through one another

• ​Effusion: gas will find opportunity to move in effusion gas escapes through a tiny opening.

​Gas Behaviors

​

Multiple Choice

According to the kinetic-molecular theory, particles of matter

• are in constant motion.

• have different colors.

• have different shapes.

• are always liquid

Multiple Choice

The kinetic-molecular theory explains the behavior of

• gases only

• liquids and gases

• solids and liquids

• solids, liquids, and gases

Multiple Choice

Two moving steel balls collide and their total energy after the collision is the same as before. This is an example of

• effusion

• an elastic collision

• expansion

• compression

Multiple Choice

Which is an example of gas diffusion?

• inflating a flat tire

• a tea bag being placed into hot water

• the odor of perfume spreading throughout a room

• all of the above

Multiple Choice

Kinetic energy is direction proportional to temperature. If temperature increases the kinetic energy of a substance will...

• increase

• decrease

• remain the same

• none of these

Multiple Choice

Which is an example of effusion?

• oxygen and gasoline fumes mixing in an automobile carburetor

• helium dispersing into a room after a balloon pops

• he aroma of a cooling pie spreading across a room

• air slowly escaping from a pinhole in a tire