Which of the following is not a postulate of Kinetic molecular theory of gases?

JAMB Physics 2023 225 views
Source: JAMB · 2023

Which of the following is not a postulate of Kinetic molecular theory of gases?

  1. The collision of the gas molecules are perfectly elastic
  2. The collision of the gas molecules are perfectly inelastic ✓
  3. The average kinetic energy of gas molecules varies with temperature.
  4. The volume of the gas molecules is negligible
Explanation

The kinetic theory says gas molecules collide with each other and with the walls without losing kinetic energy. Such collisions are perfectly elastic.

So saying the collisions are perfectly inelastic is not a postulate of the theory. The other three statements are real postulates.

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