Q.Write Postulates of kinetic theory of gases.

Postulate 1. Gases consist of tiny discrete particles (molecules or atoms).

Postulate 2. Gas molecules, on average, remain far apart from each other, so the actual volume of the gas particles themselves is negligible compared to the total volume of the container -- this is why gases are so highly compressible.

Postulate 3. The attractive forces between gas molecules are negligible at ordinary temperature and pressure, so a gas expands to occupy the entire volume of its container.

Postulate 4. Gas molecules are in constant, random motion, moving in straight lines in every possible direction, and collide with each other and with the walls of the container.

Postulate 5. The pressure of a gas arises from the collisions of gas particles with the walls of its container.

Postulate 6. Collisions between gas molecules (and with the walls) are perfectly elastic, meaning the total kinetic energy of the colliding particles is unchanged after the collision. …

• Omitting postulate 7, the K.E.-temperature proportionality, which most directly connects the theory back to the measurable gas laws. …