Y2 Kinetics (P) Flashcards
4 requirements in Collision Theory
2 Methods to increase rate
5 factors to affect rate
How do you measure rate?
Rate law
Zero order
How does changing the concentration affect the rate?
First order
How does changing the concentration affect the rate?
Second order
How does changing the concentration affect the rate?
How do you work out an order of reaction?
Substances that appear in the rate equation but not in the balanced equation
Catalysts
Rate constant units always end in
s^-1
The rate constant (k)
Units for rate constant
K value changes with
Temperature
Initial rates table
- Using two experiments with only one change in reactants concentration. Order of a single reactant can be calculated by observing the change in rate
- May have to ‘create’ and experiment on a new row to be able to work out the orders
E.g double one reactant (with all others constant) that is first order, rate will double - To find k sub in values (from the first row of the table is easiest) into the overall rate equation
Which is the rate determining step?
Step 2
RDS intermediates, no of times species reactant appears, balanced equation
Unimolecular and bimolecular reaction
Intermediate can also be called
Transition state compound
Causes of unimolecular or bimolecular reactions
Measuring Reactions rate methods
What does the Arrhenius Equation show
The relationship between rate constant, temperature and activation energy
The Arrhenius Log graph
The rate determining step (RDS)
