1.9-1.12 Flashcards
Slowest step in reaction is the what
-Rate determining step
-has highest Ea
-will be the biggest hill on a graph
Reaction intermediates def
-Cant build up, used up in subsequent step of reaction
-Low energy, stable
-overall rate is unaffected by increasing concentration of intermediates
-appears on product side, then reactant side
How to find overall rate
Add up all steps, cancel any species that occur on BOTH sides of equation
How to find activated complex + def
-unstable reaction intermediate
-high PE, low KE
-Add reactants together
How can you find if an intermediate concentration will be low/high?
If reactant is on a fast step, it’ll be low (produced slowly, used fast)
If reactant is on a slow step, it’ll be high (produced rapidly, used up slowly)
If you increase the concentration of a reactant, will the rate increase
If it’s in the RDS, yes
Which formula of a graph has the greatest potential and kinetic energy
PE = highest point
KE = lowest point
Mechanism def
steps that determine overall reaction
How can kinetic energy of colliding particles be increased
Increasing temp
Increasing the temp of a reaction increases the rate by ____ and ____
Increasing frequency of collisions
Increasing KE
Can a catalyzed graph have multiple hills on it?
Yes, as long as the catalyzed graph starts AND ends at the same place as the uncatlyzed graph
Can a pressure gauge be used to measure the rate of the reaction
Yes, if the reaction has a gas AND is in a closed system
What happens as an activated complex changes to products
PE changes to KE
What happens to the PE and total energy as an AC changes into products
PE dec, total energy remains same
