1781571
RATES OF
REACTION
- COLLISION THEORY
- TEMPERATURE
- increase in temperature
makes particles move
quicker and so more
collisions will have
- increase in temperature
also increases the energy
of the particles so at high
temperature there will be
more particles colliding
with enough energy to
make the reaction
successful
- increase in temperature
makes particles move
quicker and so more
collisions will have
- CONCENTRATION/PRESSURE
- concentrated solution has more
reactant particles in the SAME
volume so collisions are more likely
- Increasing pressure in a gas makes the
molecules more crowed so FRQUENCY of
collision is increased
- concentrated solution has more
reactant particles in the SAME
volume so collisions are more likely
- SMALLER PARTICLES
(LARGER SURFACE
AREA)
- Larger surface gives
particles to more area to
work on so FREQUENCY
of collisions are increased
- Larger surface gives
particles to more area to
work on so FREQUENCY
of collisions are increased
- CATALYSTS
- increases
speed of
reaction
without being
chemically
changed or
being used up
in a reaction
- WILL NOT catalyse
all reactions
- Only need a small
amount to catalyse large
amounts of reactants
- It gives particles a surface to
stick on where they can bump
into each other. This reduces
the energy need and so
increases the number of
successful collisions
- increases
speed of
reaction
without being
chemically
changed or
being used up
in a reaction
- TEMPERATURE
- VERY FAST (I.E
EXPLOSIONS)
- FAST (I.E FUEL BURNING
- MODERATE ( I.E
MAGNESIUM REACTING WITH
DILUTE ACID )
- SLOW ( I.E ACID RAIN
EFFECT ON LIMESTONE
BUILDINGS)
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