Boyle's Law

• Boyle's law


  Concerned with the relationship of pressure and volume in a gas
• Boyle's law was formulated by Robert Boyle


  1662
• Boyle's law experiment


  1. J-shaped tube with shorter end closed and longer end open

  2. Mercury poured in

  3. Volume of trapped gas determined

  4. More mercury poured in

  5. Volume of gas decreases as height of mercury increases, indicating pressure increases
• Volume and pressure of a gas

  Inversely proportional
• Mathematical expression of Boyle's law

  • Volume is inversely proportional to pressure
  • Product of pressure and volume is equal to a constant
• Increasing pressure


  Decreases volume
• Increasing volume


  Decreases pressure
• When pressure doubles, volume halves