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CLASS 11-- CHEMISTRY CHAPTER 3: GASES

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    CLASS 11-- CHEMISTRY CHAPTER 3: GASES

    CLASS 11-- CHEMISTRY
    CHAPTER 3: GASES

    Q1. In term of Kinetic of Gases Explain,


    a. Expansion of the gases:

    According to kinetic molecular theory "molecules if a gas are always in constant random motion. They collide with one another as well as with the walls of the container. Their collisions with each other as well as with the walls of the container are responsible for the pressure of the gas". Pressure of the gas is always equal to the pressure on the gas as long as temperature of the gas remains constant. If pressure on the gas is decreased then pressure of the gas will be greater than it. This extra pressure of the gas will push the piston upward which will increase the empty spaces among the gas molecules and hence occupied volume of the gas,
    On the other hand "average kinetic energy of the molecules of a gas is constant at constant temperature". If temperature of the gas is increased, molecules of the gas will move with greater velocity; thus pressure of the gas molecules will increase which will increase its volume.

    B. pressure of the gases:

    If volume of the gas is fixed and its temperature is increased then according to kinetic molecular theory molecules will move with higher velocities which will increased its pressure (Amonton’s law).

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