Kinetics Flashcards
What is meant by the term order of reaction with respect to A?
Power, shown as x in [A]x ,of concentration term
in rate equation
How can you tell that H+ acts as a catalyst in this reaction?
Appears in rate equation but does not appear in stoichiometric equation
What change in the reaction conditions would cause the value of the rate constant to
change?
temperature
Rate-determining step
Involves all the species in the rate equation in the reactants
State the effect, if any, on the value of the rate constant k when the temperature is lowered but all other conditions are kept constant. Explain your answer.
- Lowered as fewer particles have energy > Ea.
- This leads to fewer successful collisions
Le Chatelier’s principle
If there’s a change in conc, pressure, temp, equilibrium shifts to oppose change
Rate of a reaction?
change of concentration per unit time;
rate = k[E]
Why does doubling the temperature has a much greater effect on the rate of the reaction than doubling the concentration of E.
- Reaction occurs when molecules have E≥Ea
- Doubling T causes many more molecules to have this E
- Whereas doubling [E] only doubles the number with this E
When might a mechanism be suggested to be the rate determining step?
when it’s the only step which includes all the species that are in the rate equation
