KINETIC THEORY OF GAS | CLASS 11 || CBSE PHYSICS || BEST HANDWRITTEN NOTES || NCERT

Kinetic theory of gases is a theoretical model that describes the molecular composition of the gas in terms of a large number of submicroscopic particles which include atoms and molecules. Further, the theory explains that gas pressure arises due to particles colliding with each other and the walls of the container. Kinetic theory of gases also defines properties such as temperature, volume, pressure s well as transport properties such as viscosity and thermal conductivity as well as mass diffusivity. It basically explains all the properties that are related to the microscopic phenomenon. The significance of the theory is that it helps in developing a correlation between the macroscopic properties and the microscopic phenomenon. In simple terms, the kinetic theory of gases also helps us study the action of the molecules. Generally, the molecules of gases are always in motion and they tend to collide with each other and the walls of the containers. In addition, the model also helps in understanding the related phenomena such as the Brownian motion.

Kinetic Theory of Gases Postulates The kinetic theory of gas postulates is useful in the understanding of the macroscopic properties from the microscopic properties. Gases consist of a large number of tiny particles (atoms and molecules). These particles are extremely small compared to the distance between the particles. The size of the individual particle is considered negligible and most of the volume occupied by the gas is empty space. These molecules are in constant random motion which results in colliding with each other and with the walls of the container. As the gas molecules collide with the walls of a container, the molecules impart some momentum to the walls. Basically, this results in the production of a force that can be measured. So, if we divide this force by the area it is defined to be the pressure. The collisions between the molecules and the walls are perfectly elastic. That means when the molecules collide they do not lose kinetic energy. Molecules never slow down and will stay at the same speed. The average kinetic energy of the gas particles changes with temperature. i.e., The higher the temperature, the higher the average kinetic energy of the gas. The molecules do not exert any force of attraction or repulsion on one another except during collisions. In Kinetic theory of gas we study how velocity, kinetic energy or motion is relaated to temperture. Best notes which will help you in Jee Mains and CBSE Board exam these notes based on NCERT. Handwritten notes are available in pdf form below. Notes are made under the guidence of Mr. Samir Varshney(physics faculty saharanpur ) Share with others.....To show your love Thank you for visiting this platform .. Stay connect and get excellence with us