KINETIC MOLECULAR THEORY (KMT)

by • 10/09/2013 • GeneralComments (0)396

KINETIC MOLECULAR THEORY (KMT):

A theory which explains the behaviour of gases on the basis of motion of their molecules is called “KMT” of gases.

POSTULATES:

COMPOSITION:

All the gases are composed of small indivisible particles called atoms or molecules.

STATE:

Gaseous molecules are always found in motion, travelling in a straight path but in random directions.

INTERMOLECULAR SPACES:

There are large spaces present between molecules of gases as compared to particles of solid and liquid.

INTERMOLECULAR FORCES:

There will be no force of attraction or repulsion found between molecules of gases.

VOLUME:

The real volume of a gas is negligible as compared to the volume occupied by gas or apparent volume.

FREE- PATH:

The distance between two consecutive collisions of molecules of gases while present in a container is called “FREE PATH”.

MEAN FREE PATH:

The distance travelled by a molecule between two consecutive collisions is called Free Path. The average of all free path of molecules of gases is called “Mean Free Path,”

ELASTIC COLLISION:

When molecules of gases collide with each other or with walls of container, these collisions are perfectly elastic.

 

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