Factors affecting the rate of reaction Flashcards
What are the 4 main factors that affect the rate of a reaction?
Temperature
Concentration/Pressure
Surface area
Use of a catalyst
What is the Collision theory?
The collision theory states that the reacting particles must have enough energy when colliding to react and also be in the correct orientation.
What is the minimum energy required for a successful collision called?
Activation energy
What determines a successful reaction?
The amount of energy particles have when colliding.
The frequency of collisions.
How does temperature affect the rate of a reaction?
They have more energy when colliding.
The frequency of collisions increases
This increases the rate of reaction
How does concentration/pressure affect the rate of a reaction?
The frequency of collision increases
As the particles are more confined.
The energy of the collisions does not change
.
How does surface area affect the rate of a reaction?
The higher the surface area, the more area the particles have to collide so the more frequent the collisions.
The energy is not affected.
How does a catalyst affect the rate of a reaction?
A catalyst provides an alternative reaction pathway by lowering the activation energy.
Catalysts are specific to certain reactions.
