Chapter 10: Properties of Gases

Question 1

What are the assumptions of the Kinetic Theory of Gases

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Answer 1

• Gases are made up of particles that are in continuous rapid, random motion, colliding with each other and with the walls of the container
• there are no attractive or repulsive forces between the molecules of a gas
• the gas molecules are so small and so widely separated that the actual volume of all the molecules is negligible compared with the space they occupy
• when molecules collide, the collisions are perfectly elastic.

Question 2

Under what conditions do real gases come close to ideal gases?
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Answer 2

• at low pressure when the molecules are widely spaced

- at high temperatures when the molecules are moving rapidly, preventing the forces between molecules from operating