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speed of reaction (factors affecting speed of reaction (surrounding…
speed of reaction
factors affecting speed of reaction
surrounding temperature
concentration of a solution
ratio of surface area to volume of a solid
catalyst
pressure of gas
measuring speed of reaction
amount of reactant used/time taken
amount of product formed/time taken
change in temperature
change in reactant colour
collision theory
how reactions occur
chemical molecules move randomly
they eventually collide
if the energy of the collision exceeds the required activation energy
bonds are broken and new bonds form
and a reaction occurs, forming new products
how does each factor increase speed of reaction?
temperature
increased temperature = more kinetic energy = increased energy on impact = higher chance of effective collision
concentration
more molecules per square unit of volume = higher frequency of effective collision
pressure
more proximity = higher frequency of effective collision
catalyst
decreases activation energy
lesser energy required = higher frequency of effective collision
surface area
larger surface area to volume ratio = more area for collision = higher frequency of effective collision
To note
Collide energy ≥ activation energy
Increases frequency of effective collisions