Changes of state

• Changes of state:

  .

  A) Evaporation

  B) Condensation

  C) Melting

  D) Freezing

  E) Sublimation

  F) Desublimation

  
• Changes of state graph (cooling)

  A) Condensing

  B) Freezing

  C) Liquid

  D) Solid

  E) Gas

  
• Changes of state (heating)

  A) Melting

  B) Evaporation

  C) Gas

  D) Liquid

  E) Solid

  
• Things that happen in melting and boiling:

  • bonds between particles are broken
  • internal energy increases
  • temperature stays the same
• Things that happen in condensing and freezing:

  • stronger bonds between particles start to form
  • internal energy decreases
  • temperature stays the same
• Changes of state are physical changes and mass is always conserved