Kinetic Theory of Gases

Question 1

6 main ideas of kinetic Theory of gases:

Answer 1

1) Particles of gases moves in continuous, random straight-line motion.
2) The average distance between gas particles is very large compared to the size of the particles themselves.
3) There are negligible intermolecular forces between gas particles.
4) The collisions between gas particles are elastic.
5) Pressure is caused when gas particles hit the walls of their container.
6) Temperature is a measure of the average kinetic energy of particles.

Question 2

Properties of gases:

Answer 2

• Exert pressure
• Rapidly diffuse and mix
• Compressible
• Low density
• Occupies the container

Question 3

What is compressibility (property of gas):

Answer 3

• Ability to decrease the distance between particles.

Question 4

Explanation of compressibility (property of gas) with KE theory:

Answer 4

Average distance between particles is very large compared to size of particles themselves. Therefore, you can compress a gas by reducing the distance between particles.

Question 5

What is diffusion (property of gas):

Answer 5

• Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

Question 6

Explanation of diffusion (property of gas) with KE theory:

Answer 6

Particles of gases will move in random straight-line motion, causing them to spread from areas of high concentration to areas of low concentration and fill the container.

Question 7

Absolute zero:

Answer 7

Is the state of matter when its temperature reaches -273.15˚C. This point is the theoretical lowest temperature that can be reached by any type of matter in-which there is zero movement in particles.

Question 8

What is ideal gas?

Answer 8

Is an imaginary gas that always follows the principles of the kinetic energy of gases.
- Large distances between particles
- No attraction between particles.

Question 9

What is real gas?

Answer 9

Is gas which will deviate from KE principles and trends, particularly at very low temperatures.
- Distances between particles get smaller
- Attraction (intermolecular forces) between particles get stronger.

Question 10

What is Avogadro’s law?

Answer 10

States that equal volumes of gas at the same temperature and pressure contain the same number of particles.

Question 11

What is molar mass?

Answer 11

The volume occupied by 1mol of gas at a specific set of conditions.