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Kinetic Model of Matter

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  • 1. Kinetic Model of Matter CHANG, FANG-HSIN @ EDISON CHANG PGDE (Sec), July 2006
  • 2. Kinetic Model of Matter By the end of this lesson, you should be able to:
    • 1. Use Kinetic Model of Matter to:
      • compare the physical properties ; and
      • decribe the molecular structure
      • of the three states of matter: Gas , Liquid and Solid .
    • 2. Understand that Brownian Motion proves Kinetic Model of Matter .
    • 3. Describe the relationship between temperature and molecular motion .
    • 4. Explain pressure of a gas in terms of its molecular motion .
  • 3. Part One
  • 4. CAN YOU SEE? m a croscopic m i croscopic
  • 5. CAN YOU SEE? m a croscopic m i croscopic
  • 6. What is this stuff ? What is the Matter ?
  • 7. Matter = things , ‘ stuff’ and… YOU
  • 8. What is Matter ? What are YOU made of ?
  • 9. Mobile Phone Model to represent the real thing =
  • 10. Scientific Model = solid to represent the real thing
  • 11. Scientific Model to represent the real thing = water molecule =
  • 12. Matter can MOVE Brownian Motion How do we know? Here is the proof 
  • 13. random movement of Liquid or Gas molecules Brownian Motion Matter can MOVE
  • 14. Dead Cells Brownian Motion Matter can MOVE http://www-micro.msb.le.ac.uk/video/brownian.mov get pushed around by
  • 15. Matter can MOVE + = Kinetic Energy
  • 16. Kinetic Model of Matter Matter is made of moving molecules
  • 17. Name 3 States of Matter
  • 18. Name 3 States of Matter Gas Liquid Solid
  • 19. Kinetic Model of Matter = Gas = flowing water molecule
  • 20. Kinetic Model of Matter = Liquid = flowing water molecule
  • 21. Kinetic Model of Matter = Solid = vibrating water molecule
  • 22. Hold on a second!
  • 23. Are you telling me that ICE CUBES are actually vibrating ?
  • 24. !!! YES !!! Are you telling me that ICE CUBES are actually vibrating ?
  • 25. WHY ?
  • 26. CAN YOU SEE? m a croscopic m i croscopic
  • 27. CAN YOU SEE? m a croscopic m i croscopic
  • 28. m a croscopic Can you see ice cubes vibrate when they are becoming flowing water ?
  • 29. m a croscopic Can you see ice cubes vibrate when they are becoming flowing water ? NO
  • 30. vibrating m a croscopic m i croscopic flowing But are ice cubes actually vibrating when they are becoming flowing water ?
  • 31. vibrating m a croscopic m i croscopic flowing But are ice cubes actually vibrating when they are becoming flowing water ? YES
  • 32. During melting , ice cubes are vibrating to break the attrative force that holds water molecules together to become flowing water.
  • 33. Part Two
  • 34. Kinetic Model of Matter
  • 35. Kinetic Model of Matter
  • 36. Who is HOT ???
  • 37. 100 °C 0 °C
  • 38. Who is HOT ???
  • 39. Higher Temperature
  • 40. Kinetic Model of Matter ? Kinetic Energy ?
  • 41. Kinetic Model of Matter
  • 42. Kinetic Model of Matter ? Attractive Force ?
  • 43. Kinetic Model of Matter
  • 44. Kinetic Model of Matter ? Motion ?
  • 45. Kinetic Model of Matter Vibrate Flow at fixed position Slow Fast all over the place
  • 46. Kinetic Model of Matter ? Shape ?
  • 47. Kinetic Model of Matter Fixed Changing with the shape of container
  • 48. Kinetic Model of Matter ? Distance between Molecules ?
  • 49. Kinetic Model of Matter
  • 50. Kinetic Model of Matter ? Can be Compressed ?
  • 51. Kinetic Model of Matter NO NO YES! ? Can be Compressed ?
  • 52. Liquid Nitrogen Gas Nitrogen 25 ° C -72 ° C COMPRESS
  • 53.  
  • 54. Liquid Nitrogen Gas Nitrogen 25 ° C -72 ° C DECOMPRESS
  • 55.  
  • 56. LIVE
  • 57.  
  • 58. Hand burnt by Liquid Nitrogen
  • 59.  
  • 60. Large Volume Small Volume COMPRESS CO 2
  • 61. Large Volume Small Volume DECOMPRESS CO 2
  • 62. Large Volume Small Volume DECOMPRESS HOW? CO 2
  • 63. Large Volume Small Volume DECOMPRESS
  • 64. DECOMPRESS ? CO 2
  • 65. DECOMPRESS ?
    • Speed ?
    • Volume ?
    CO 2
  • 66. LIVE +
  • 67. DECOMPRESS ?
    • Speed Faster
    • Volume Larger
    CO 2
  • 68. Pressure Speed of molecular motion
  • 69. http://eepybird.com/exp214.html You’ve seen nothing yet!
  • 70. Homework Play Gas Law Program to find out the relationships between: Pressure Molecular Motion V.S Molecular Motion V.S Temperature
  • 71. http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm Gas Law Program