Please enable JavaScript.
Coggle requires JavaScript to display documents.
Factors which affect the rate of reaction - Coggle Diagram
Factors which affect the rate of reaction
Temperature
high temperature
provide more thermal energy
energy that are being transferred to kinetic energy increase -> particles move faster which increase in collisions
low temperature
provide particles with less thermal energy
particles move slower & collide less frequent -> the rate of reaction decrease
example - firework vs iron rusting
the rate of reaction of fireworks is faster as it involves heat while iron rusting is not
higher temperature -> higher proportion of particles will have greater than the required activation energy -> more successful collision per second -> increasing the rate of reaction
concentration
increasing the concentration -> increases the collision rate
more reactant particles per cm3 -> more frequent collisions -> more successful collisions per second -> increase in the rate of reaction
example
1 mole = 6.02 x10^23 (atoms)
1.5 mole = 9.03 x 10^23 (atoms)
0.5 mole = 3.01 x 10^23 (atoms)
increase in mole -> increase the concentration ( because there are more atoms per cm3)
Surface area
increase in surface area -> increase the collision rate
more solid particles will be exposed to the other reactants -> more frequent collision -> more successful collisions per second -> increase the rate of reaction
example
powder salt dissolve in water or react faster -> higher surface area
rock salt dissolve in water / react slower -> lower surface area