Properties Describing A Gas

• It has no definite volume or shape

  Gas
• 5 characteristics of Gas

  1. indefinite shape and volume
  2. highly compressible
  3. particles are far apart
  4. conforms to the shape of the container
  5. low density
• 4 properties of gas


  pressure (symbolize as P)

  volume (symbolized as V)

  temperature (symbolized as T)

  quantity (symbolized as n)
• Pressure


  A force acting on a specific area
• Pressure (P)


  Force/Area
• Units of pressure


  • atm
  • mm Hg
  • torr
  • lb/in 2
• 1 atm


  760 mm Hg = 760 torr
• 1 atm


  101.325 kPa
• Volume


  The three-dimensional space occupied by a gas
• Units of volume


  • L
  • mL
  • cm³
  • m³
• Temperature


  Measure of the average kinetic energy of the particles in an object
• Quantity


  The amount of gas in a container, measured in moles (n)
• 1 mole = 6.022 x 10^23 units of a substance