Please enable JavaScript.
Coggle requires JavaScript to display documents.
How do these affect reaction rates?, Explore Questions - Coggle Diagram
How do these affect reaction rates?
Temperature
Too Cold:
the reacting particles have less kinetic energy
they collide with each other less frequently
when they do collide they are less likely to have energy greater than the Activation Energy
each collision is less likely to be successful
Too Hot:
the reactant particles move more quickly
they have more energy
the particles collide successfully more often
the rate of reaction increases
[higher tier only] this is due to more particles having energy greater than or equal to the activation energy
Concentration
As the concentration of reactants increases, the more the reactant particles move closer together. This means there will be more collisions, which increases the reaction rate. Therefore, the higher the concentration of reactants, the faster the rate of a reaction will be.
Catalysts
It increases the rate of a chemical reaction but it is not used up- it remains chemically unchanged at the end.
It provides an alternative reaction pathway of lower activation energy.
Explore Questions
Page 133
Page 129
Page 135
Page 131
Page 137