09 Temperature & Ideal Gases

Question 1

What is thermal equilibrium?

Answer 1

Situation in which there is no net exchange of energy when two objects are placed in thermal contact

Question 2

Ideal Gas equation

Answer 2

pV = nRT

pV = NkT

Question 3

Assumptions of Kinetic Theory of Gases

Answer 3

Zero microscopic potential energy

• Forces between particles are negligible

Energy is conserved

• Collisions between particles and wall are elastic

Particles are treated as point masses

• Gas is made up of large number of particles
• Particles are in constant, random motion
• Volume of each particle is negligible compared to volume of the gas
• Duration of collisions is negligible compared with time interval between collisions

Question 4

Kinetic Theory equation

Answer 4

pV = ⅓Nm〈c²〉

Question 5

Mean KE of one particle

Answer 5

〈E_k〉 = (3/2)kT

Question 6

KE of a gas

Answer 6

E_k = (3/2)NkT

E_k = (3/2)nRT