Thermochemistry

Explain in detail how heat energy moves during the freezing and boiling of a substance.

• Freezing
  • lose energy
  • lowered temperature
    • decrease kinetic energy of molecules
  • less molecular motion → crystal structures
  • become crystal/solid
• Boiling
  • gain energy
  • raise temperature
    • increase kinetic energy
  • more motion → breaking surface tension
  • become single molecules in a gas

• Main Points
  • Increase in energy → increase in temp and vice versa
  • Increase in temp → increase in kinetic energy
  • Increase in kinetic → increase in molecules motion
    • all pertain to decreasing as well
  • More energy → more emotion
  • Less energy → less motion