Particle Motion in Gases

  • Created by: hjbh
  • Created on: 06-10-18 11:18
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  • Particle Motion in Gases
    • Relation to Temperature
      • increase the temperature of a gas, you transfer energy into the kinetic energy stores of its particles
      • the higher the temperature, the higher the average energy
        • so as you increase the temperature of a gas,the average speed of its particles increases
    • Relation to Pressure
      • gas particles move at high  speeds          --->collide into each other--->they exert a force on it
      • in a sealed container, the outward gas pressure is the total force exerted by all the particles in the gas on a unit area of the container walls
      • faster particles and more frequent collisions lead to increase in net force and gas pressure
        • increasing temperature will increase speed and pressure
      • if temperature is constant, increasing the volume of gas means particles get spread out and hit the walls of the container less
        • gas pressure decreases
      • pressure and volume are inversely proportional.
        • pV=constant
    • Change in Pressure Causes Change in Volume
      • if a container can easily change its size, then any change in these pressures will cause the container to compress or expand due to overall force

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