C3: Kinetics Flashcards
collision theory states….`
for a reaction to occur, we need collisions between molecules. the collision must have enough energy and be in the correct orientation
what can change the likelihood of molecular collisions?
- temperature. as it increases, kinetic energy increases and molecules move faster
- concentration, as it increases, collisions become more frequent
all reactions go through a ____ and you can only tell if it is present based on the ____
transition state; product
what is the activation energy barrier?
- what is it inversely related to?
the energy needed to produce the transition state
- the rate constant (k)`
the lower the activation energy, the faster the ____
reaction rate
in a reaction coordinate diagram,
what is an intermediate?
- is it part of the overall rxn?
- high energy means it is ____ and therefore ____ to isolate
- formed between steps and used up as quickly as they are formed
- no
- more reactive; harder
what is the rate determining step in a reaction?
the slowest step in the process that determines the overall reaction rate
describe what a reaction coordinate diagram looks like
CHECK FOLDER
the greater the concentration of the reactants, the faster the ____
reaction rate
the higher the temperature of the reaction mixture, the ____ the reaction rate
faster
Describe what the reaction coordinate diagram of an exergonic rxn looks like
CHECK FOLDER
Describe what the reaction coordinate diagram of an endergonic rxn looks like
CHECK FOLDER
in an exothermic reactions coordinate diagram,
- is heat released/ absorbed
- what is the change in heat?
- released
- less than 0
in an endothermic reactions coordinate diagram,
- is heat released/ absorbed
- what is the change in heat?
- absorbed
- greater than 0
Describe what the reaction coordinate diagram of an exothermic rxn looks like
CHECK FOLDER
