Kpt remedial
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Kpt remedial

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Kpt remedial Presentation Transcript

  • 1. Kinetic Particle Theory Revision
  • 2. What is Kinetic Particle Theory?
    • All matter are made up of particles
      • Particles: atoms, molecules and ions
    • The properties of different matters are determined by the arrangement and movement of particles.
      • Kinetic Particle Theory
        • Describes the arrangement and movement of the particles.
  • 3. Properties at Particle Level Affects motion and arrangement of particles Affects volume and compressibility– fixed or not Affects shape – fixed or not Disorderly Very far apart Disorderly Packed Orderly Closely packed Arrangement Highest low Lowest Kinetic energy Move freely at great speeds Slide over each other Vibrate in fixed position Motion of particles Weakest Strong Strongest Forces of attraction Gas Liquid Solid
  • 4. Effects of heat on particles and temperature
    • As matter is heated, the particles gain kinetic energy (move/vibrate faster)
    • When temperature reaches melting/boiling point, heat energy is used to overcome the forces of attraction.
    • When all the particles have overcame the forces of attraction, heat energy increase the kinetic energy of particles.
    • Temperature rises
    • Temperature remains constant
    • Temperature rises
    Particles Temperature
  • 5. Effects of cooling on particles and temperature
    • As matter is cooled, the particles lose kinetic energy (move/vibrate slower)
    • When temperature reaches melting/boiling point, particles are attracted together and release heat energy to the surroundings.
    • When all the particles have overcame the forces of attraction, the particles continue to lose kinetic energy
    • Temperature decreases
    • Temperature remains constant
    • Temperature decreases
    Particles Temperature
  • 6. Regarding the assignment
    • MCQ
    • C
    • No possible answer; The answer should be processes 2,3 and 5
    • C; The individual ions will separate far apart.
  • 7. Regarding the assignment
    • Question 4a:
      • A lot of you just stated what are particles in liquid and gas are like but did not directly compare the differences
      • Example of one difference
        • Particles in liquid are packed closer to each other than particles in gas; or
        • Particles in liquid are packed while particles in gas are far apart
  • 8. Regarding the assignment
    • Question 4b:
      • A lot of you just stated what happens to the particles when the liquid is boiling but did not mention what happens before and after boiling.
        • From 25 o C to 100 o C, the particles gain kinetic energy and move faster. When temperature rises to 100 o C, heat energy is used to overcome the attractive forces between the particles and the particles move further apart. From 100 o C to 150 o C, all the particles have separated further apart and are moving faster as the temperature rises.