states of matter

• solids


  • the particles have regular arrangements
  • the particles are close together
  • the particles vibrate about fixed positions
  • little kinetic energy

  
• liquids

  • the particles have random arrangements
  • the particles are still close together
  • the particles move around eachother
  • some kinetic energy

  
• gases


  • the particles have random arrangements
  • the particles are far apart
  • the particles move fast in all directions
  • a lot of kinetic energy

  
• a physical change is when particles are arranged differently but the chemical properties of the substance do not change, these changes are always reversible
• a chemical change is when particles have undergone a chemical reaction so the chemical properties of the substance has changed, these changes are usually irreversible
• interconversion between states of matter

  A) sublimation

  B) evaporation

  C) condensation

  D) freezing

  E) melting

  F) desublimation