Lesson 1

• Pressure of a gas


  The force which gas exerts on the walls of the container
• Boyle's Law: '"for a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional."'
• If the temperature is constant

  As the pressure of a gas increases, the volume decreases
• As the pressure decreases


  The volume increases
• According to the Kinetic Molecular Theory, these molecules are in constant motion
• Standard unit for pressure


  Pascal (Pa)
• Pressure units and equivalents

  • 1 atm = 760 mmHg
  • 1 mmHg = 1 torr
  • 1 atm = 101325 Pa
  • 1 atm = 101.325 kPa
  • 1 kPa = 7.500 torr
  • 1 atm = 14.6959 psi
• Volume unit conversions


  • 3.5 L = 3,500 mL
  • 2,300 mm = 2.3 cm
  • 5.4 m = 5400 L
  • 400 cm = 400 mL
• Temperature unit conversions


  • °F = (°C × 1.8) + 32
  • K = °C + 273.15
  • °C = K - 273.15
  • (°F – 32) / 1.8 = °C
  • K = (°F – 32) / 1.8 + 273.15
  • °F = [(K – 273.15)(1.8)] + 32
• 1 mL = 1 cm^3

  1 L 1 dm^3=

  1 L = 1000 mL

  1 m³ = 1000 L

  1 mm³ = 0.001 cm^3