2.4 - Rates Of Reaction Flashcards
What is the rate of reaction?
How quickly all reactants are used up
Or
A measurement of how quickly new products are made
What is the Collision Theory
The particles of the reactants need to collide having frequent successful collisions above the activation energy
What is the activation energy?
The minimum amount if energy particles must have to react
How does temperature effect the rate of reaction
It gives the particles more kinetic energy. The vibrate and move more at a greater force causing more frequent collisions above the activation energy. Increasing the rate of reaction
How does concentration effect the rate of reaction
Higher concentration means there are more particles therefore more opportunities for successful frequent collisions. This will increase the rate of reaction
How will surface area effect the rate of reaction?
A higher surface area means there are more particles exposed to the acid so there are more successful frequent collisions above the activation energy. This will increase the rate of reaction
Which has a higher surface area? Marble chips or Marble powder
Marble powder
What does a catalyst do?
It lowers the activation energy. Allowing more successful frequent collisions above the activation energy
Are catalysts used up in a reaction? How can you tell?
No, they have the same mass at the start and end of the reaction
Do all reactions use the same catalyst?
No
Why are catalysts important in industrial processes?
To reduce the energy which will reduce the costs and environmental impact
Are catalysts costly? Economical?
Expensive but economical as they don’t need replacing often
