Rates of Reaction Flashcards
Do all reactions use the same catalyst?
No, different catalysts are required for different reactions
What are catalysts?
Things that change the rate of reactions but are not used up
Which 2 ways calculate the rate of reaction?
Amount of reactant used/ time
Amount of product formed/ time
Why are catalysts useful in industry?
They increase the rate of reaction so reduce costs
What’s activation energy?
Minimum amount of energy particles must have to react
Which 4 things affect rate of reaction?
Temperature
Pressure
Concentration
Surface area
Why does increasing the temperature increase the rate of reaction?
Speed of reacting particles increases so they collide more frequently AND more energetically
Why does increasing the pressure increase the rate of reaction (in gases)?
More frequent collisions
Why does increasing the concentration of reactants in a solution increase the rate of reaction?
Frequency of collisions increases
Why does increasing the surface area of a solid increase the rate of reaction?
It increases the frequency of collisions
