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Rate of Reaction (factors affecting rates (concentration or pressure (if…
Rate of Reaction
factors affecting rates
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surface area
if one of the reactants is solid then breaking it up into smaller pieces will increase its surface area to volume ratio
this means that for the same volume of the solid the particles around it will have more area to work on increasing the collisions
the temperature
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the faster they move the more they collide and as the faster they move the more energy they have so more of the collisions will have enough energy to make reactions happen
presence of catalysts
they work generally be decreasing the activation energy needed for the reaction to occur by providing an alternative reaction pathway with a lower activation energy
collision theory
chemical reactions can occur only when reacting particles collide with each other with sufficient energy
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the activation energy is needed as the particles need this much energy to break the bonds in the reactants and start the reaction
catalysts
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catalysts increase the rate of reaction by providing a different pathway for the reaction that has lower activation energy
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the units of rate of reaction may be given in g/s, mol/s or cm3/s