Which of the following is not an assumption of the kinetic theory of gases

Which of the following is not an assumption of the kinetic theory of gases?

  1. A gas consists of many identical particles which are in continual motion.
  2. Gas particles have negligible volume.
  3. At high pressure, gas particles are difficult to compress.
  4. Collisions of gas particles are perfectly elastic.

Solution

To explain the behavior of the gases theoretically, Claussius, Maxwell and Boltzmann made the following assumptions:

  • Gases consist of large number of tiny particles called molecules.
  • Total volume of the molecules is a negligible fraction of the total volume occupied by the gas.
  • The molecules are in a state of constant, rapid and random motion colliding with one another and with the walls of the container.
  • There are no attractive or repulsive forces between the molecules of the gas.
  • The collisions of the molecules among themselves and with the walls of the containing vessel are perfectly elastic.
  • The pressure exerted by a gas is due to the bombardment of the molecules on the walls of the containing vessel.
  • The kinetic energy of a gas is a directly proportional to the absolute temperature of the gas.

The correct option is C.