pressure in gases

• Pressure of a gas

  Due to the particles colliding with the walls of the container the gas is held in
• Particle collisions


  • Cause a force acting at right angles to the walls of the gas container
  • This 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
• Pressure of a gas

  Inversely proportional to the volume
• Relationship between pressure and volume

  Pressure (in Pascals) x Volume (in m^3) = Constant (if temperature is constant)
• This relationship between pressure and volume is only true if temperature is kept constant
• The equation relating pressure and volume is provided in the exam