Kinetic theory of gases

Question 1

What is a mole?

Answer 1

The amount of substance that contains as many elementary entities are there are atoms in 0.012kg of carbon-12.

Question 2

What are the assumptions made for an ideal gas?

Answer 2

• The gas contains a very large number of atoms or molecules moving in random directions with random speeds
• Atoms or molecules of the gas occupy a negligible volume compared with volume of the gas
• The collisions of atoms or molecules with each other and the container walls are perfectly elastic
• Time of collisions is negligible
• Electrostatic forces between atoms or molecules are negligible except during collisions

Question 3

What is mean square speed?

Answer 3

Average of the squared speeds of all the particles, so the root of its gives you the typical speed.