Postulates of kinetic theory of gases pdf

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According to kinetic theory, the pressure exerted by a gas is the result of collisions between gas molecules and the walls of the container where they exist. The gas temperature is related to the average speed of movement of the gas molecules. However, at a constant temperature, the speed of the molecules actually remains constant. 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. Kinetic Theory of Gases III.A General Definitions • Kinetic theory studies the macroscopic properties of large numbers of particles, start­ ing from their (classical) equations of motion. Thermodynamics describes the equilibrium behavior of macroscopicbjects o n terms i of concepts such as work, heat, and entropy. The phenomenological laws The main postulates of the theory are as under-. All gases are made up of a very large number of small particles called molecules. Gas molecules do not attract each other appreciably. Molecules are separated from each other by large spaces so that actual volume occupied by the molecules is negligible as compared to the total volume of gas.