Kinetic Theory of Gases

1

A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 32 V, the efficiency of the engine is

  1. .99
  2. .75
  3. .50
  4. .25
2

One kg of a diatomic gas is at a pressure of 8 × 104 N/m2. The density of the gas is 4 kg/m3. What is the energy of the gas due to its thermal motion?

  1. 3 × 104 J
  2. 5 × 104 J
  3. 6 × 104 J
  4. 7 × 104 J
3

1 mole of a gas with γ = 7/5 is mixed with 1 mole of a gas with γ = 5/3, then the value of γ for the resulting mixture is

  1. 2/5
  2. 24/16
  3. 12/7
  4. 7/5