C2.4 - Rates Of Reaction Flashcards
What is the minimum energy needed for two particles to react called?
The activation energy.
What can be done to increase the rate of reaction? (4)
- Increasing the temperature.
- Increasing the pressure.
- Increasing the concentration of the reactants.
- Increasing the surface area of the reactants.
Why does increasing the temperature increase the rate of reaction?
Particles move faster and therefore collide more frequently and more energetically.
Why does increasing the pressure increase the rate of reaction?
The frequency of collision increases.
Why does increasing the concentration of the reactants increase the rate of reaction?
The frequency of collisions is greater.
Why does increasing the surface area of the reactants increase the rate of reaction?
The frequency of collisions is greater.
What are catalysts?
Substances that speed up the rate of reaction by providing an alternate path for the reaction to travel along, but are not used up during the reaction.
Why are catalysts important in industry?
Energy costs are reduced.
What equation can be used to find the rate of a reaction?
Amount of reactant or product used/Time
