science

• Properties of Gases


  • No definite shape
  • No definite volume
  • Compressible
• Theory


  Well supported ideas
• Basic Kinetic Theory of Gases

  • Composed of particles like atoms (ex: He) or molecules like (O2 and CO2)
  • There are no attractive/repulsive forces
  • Lots of empty space
• Particles in the Basic Kinetic Theory of Gases

  1. Move in random, constant, straight-line motion

  2. Move independently of each other
• Collisions in the Basic Kinetic Theory of Gases

  • All collisions are elastic meaning that KE is transferred without loss of energy
  • No change in kinetic energy
• Gases tend to


  Diffuse towards areas of lower concentration
• Gas Pressure


  Force exerted on container walls by particles in a gas
• Units used for gas pressure

  • kPa
  • atm
  • Torr
  • mmHg
• Boyle's Law


  Pressure and volume have an inverse relationship, if temperature remains constant
• Charle's Law


  Volume and temperature have a direct relationship, if pressure is held constant
• Gay Lussac's Law


  Pressure and temperature have a direct relationship, if volume remains constant
• Ideal Gases


  • Behave as predicted by Kinetic Molecular Theory
• Real Gases


  Deviate from ideal behavior