pressure in gases (TRIPLE)

• Gas pressure


  Caused by particle collisions with the walls of the gas container
• Particle collisions


  • Force acts at right angles to the walls of the gas container
  • Force acting over the area of the container causes the gas pressure
• Increasing the volume of the gas container while keeping temperature constant

  Reduces the pressure
• Increasing the volume of the gas container

  • Increases the spacing between the particles
  • Particles travel further before colliding with the walls
  • Reduces the number of collisions per second between the particles and the walls
  • Reduces the pressure
• Pressure of a gas

  Inversely proportional to the volume
• Relationship between pressure and volume

  1. Pressure (in Pascals) x Volume (in m^3) = Constant

  2. (Only true if temperature is kept constant)