Kinetic Particle theory

• Solids

  • closely packed in an orderly manner
  • vibrate & rotate about their positions
  • Forces of attraction is very strong
  • It has a fixed shape and volume
  • cannot be compressed
• Liquids

  • closely packed in a disorderly manner
  • slide past one another throughout the liquid
  • Forces of attraction is strong but weaker than solids.
  • It has a indefinite shape but fixed volume
  • cannot be compressed
• Gas

  • spread very far apart in a disorderly manner
  • move about rapidly & randomly in any direction
  • Forces of attraction is very weak
  • It has a indefinite shape and volume
  • can be compressed
• Processes:

  • Sublimation: where a substance changes directly from a solid to a gas
  • Condensation: process where a gas changes to a liquid
  • Melting: where substances changes from solid to liquid
  • Freezing: where substances changes from liquid to solid
  • Evaporation: process where liquid changes to gas at a temperature lower than its boiling point
  • Boiling: where substances changes from liquid to gas