Kinetic Molecular Theory

• Kinetic molecular theory


  Theory that helps us understand the different properties of gases at the molecular level
• Kinetic molecular theory


  • Gases are composed of molecules
  • Distances between molecules are far greater than the molecules' dimensions
  • Molecules are in constant random motion
  • Molecules frequently collide with one another
  • Collisions between molecules are perfectly elastic
  • Attractive and repulsive forces are absent
  • Average kinetic energy of gas molecules is directly related to temperature
• Perfectly elastic collision


  A type of collision wherein there is no loss of kinetic energy
• Avogadro's law


  Relates the number of moles and volume of a gas, which are directly related when pressure and temperature are held constant
• Ideal gas law


  Combines Boyle's law, Charles' law, and Avogadro's law into a single equation
• Ideal gas law formula

  pV = nRT
• Atom – basic building block of matter
• Kinetic energy and temperature are directly proportional.
• The attractive and repulsive forces among gas molecules is said to be negligible-too small to be counted.
• Compressibility-is a measure of the instantaneous relative volume change of a fluid or solid as a response to a pressure (or mean stress) change.