Lecture15222

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a supplemental resource for students

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Transcript

  • 1. Liquid and Solid States: the Uniqueness of Water Lecture 15
  • 2. The principal substance
  • 3.  
  • 4.  
  • 5. Water on Mars
  • 6. Colors are traditional
  • 7. Colors are traditional
  • 8. H 2 O as a source of inspiration
  • 9. H 2 O as a source of inspiration
  • 10. In what the uniqueness?
    • great solvent properties due to polarity and hydrogen bonding ability;
    • exceptional high specific heat capacity;
    • high surface tension and capillarity;
    • density differences of liquid and solid states.
  • 11. Bent molecular shape
  • 12. Unique solvent properties of water result from its polarity and exceptional H-bonding ability.
  • 13. Unique thermal properties of water result from its exceptionally high specific heat capacity and heat of vaporization.
  • 14. Hydrogen bonds in oceans
  • 15. Unique surface properties of water are high surface tension and high capillarity. These result from abundant H-bonds.
  • 16. Capillary action of water
  • 17. Density differences of liquid and solid states of water result from large spaces within ice.
  • 18. Ice is lighter
  • 19. Snow crystals
  • 20. Snow crystals
  • 21. THE END