Rates Of Reaction Flashcards
What are the factors that affect rate of reaction
- temperature
- concentration
- surface area
- catalyst
What are the requirements for the collision theory
Correct orientation and sufficient kinetic energy
Define reaction rate
The change in concentration per unit time
What does the gradient of the graph represent
It represents the rate
How do you know when the graph has reached completion
It becomes a flatline
Explain in terms of the collision theory how temperature affects rate of reaction
- increased temperature
- increase average kinetic energy of particles
- increase number of effective collisions per unit time
- increase rate of reaction
Explain in terms of the collision how concentration affects rate of reaction
- increase concentration
- increase number of effective collisions per unit volume
- increase rate of reaction
Explain in terms of the collision theory how surface area affects rate of reaction
- increased surface area
- increase number of effective collisions per unit time
- increase rate of reaction
Define activation energy
Minimum kinetic energy required to start a chemical reaction
Define activated complex
Temporary unstable transition state between reactants and products
What does a catalyst do
It lowers activation energy
Explain according to the collision theory how adding a catalyst affects the rate of the reaction
- increase rate of reaction
- lowers minimum activation energy required
- increase number of effective collisions per unit time
