Reversible Reactions Flashcards
What is a reversible reaction?
A reaction where the products of the reaction can themselves react to produce the original reactants.
What is the reversible reaction symbol?
——->
Reversible reactions will reach …
Equilibrium
What kind of system does a reversible reaction have to take place in, in order to reach a state of equilibrium?
Closed system
What does equilibrium mean?
The amounts of reactants and products will reach a certain balance and stay there.
What is a closed system?
None of the reactants or products can escape.
Describe reversible reactions in terms of rates and directions
The reactions are still taking place in both directions, but the overall effect is nil because the forward and reverse reactions cancel each other out. The reactions are taking place at exactly the same rate in both directions. (Like running on a treadmill)
What does the position of equilibrium depend on?
Temperature and pressure
All reactions are [ ]thermic in one direction and [ ]thermic in the other
exo
endo
(can be either way round)
If you raise the temp. then endothermic reaction will [ ] to use up the extra heat.
Increase
If you reduce temp. then [ ] reaction will Increase to give out more heat.
exothermic
What does greater volume on one side on the equation mean?
There are more gas molecules on that side (can be products or reactants)
If you raise the pressure it will encourage the reaction which produces [ ]
Less volume
If you lower the pressure it will encourage the reaction which produces [ ].
More volume
Adding a catalyst [ ] the equilibrium position
DOESN’T change
