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
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
SMALLER PARTICLES
(LARGER SURFACE
AREA)
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
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)