COLLISION THEORY - PowerPoint PPT Presentation

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COLLISION THEORY

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COLLISION THEORY Surface Area and Reaction Rate – PowerPoint PPT presentation

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Title: COLLISION THEORY


1
COLLISION THEORY
  • Surface Area and Reaction Rate

2
Solids
Matter
Liquids
is made of
Which are arranged differently in
Particles
Gases
3
Simple Collision Theory
4
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5
Increase temperature
  • Particles have more energy.
  • Particles move faster.
  • Particles have MORE EFFECTIVE COLLISIONS PER
    SECOND.

Low Temperature
High Temperature
6
Increase concentration
  • If a reactant is more concentrated
  • particles are more crowded
  • so there are MORE EFFECTIVE COLLISIONS PER
    SECOND!

High concentration
7
Increase surface area
Low surface area
High surface area
  • If surface area is high (as in a powder), less
    particles will be trapped in the center.
  • So there are MORE EFFECTIVE COLLISIONS
    per second.

8
  • Smaller particles have a bigger surface area than
    larger particle for the same mass of solid.

9
Bread and Butter Theory
  • Take a loaf of bread and cut it into slices. With
    each new slice, you get an extra surface to
    spread butter.
  • The thinner the slices, the more slices you get
    and so the more butter you can put on them.
  • By chewing your food you increase the surface
    area so that digestion can go faster.
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