Reversible reactions Flashcards
Reversible reactions reach …
Equilibrium
How does equilibrium reactions work
- as the … react their conc … so the … reaction … down
-as more … are made their … rises so the … reaction … up
-after a while the the … reaction will be going the … rate as the … reaction
—>this is …
-at equilibrium both … are still …, but there is no … effect
-so the … of the products and … have reached a … and won’t …
- as the reactants react their conc falls so the forward reaction slows down
-as more products are made their conc rises so the backwards reaction speeds up
-after a while the the forward reaction will be going the same rate and the backward reaction
—>this is equilibrium
-at equilibrium both reactions are still happening, but there is no overall effect
-so the conc of the products and reactants have reached a balance and won’t change
Equilibrium
-The point at which the … of the … and backward … in a … reaction are the …
-so the … of reactants and … stay the …
-The point at which the rates of the forward and backward reaction in a reversible reaction are the same
-so the amounts of reactants and products stay the same
What is a close system
No reactants or products can escape and nothing can get in
What system does equilibrium need to happen
A closed system
What positions can equilibrium be
To the left or right
When a reaction has reached equilibrium are the amount of products and reactants equal
No
What does it mean if equilibrium lies to the right
The concentration of products is greater than the reactants
What does it mean if equilibrium lies to the left
The concentration of reactants is greater than the products
What does the position of equilibrium depend on
-t…
-p…
-c…
-temperature
-pressure (only gases)
-concentration
Rule about how reversible reactions are endo and exothermic
-if the reaction is endothermic in one direction, it will be exothermic in the other
In what ways do reversible reactions counteract changes
-temperature
-pressure
-concentration
How do reversible reactions try to counteract temperature changes
-if you decrease the … the e… will move in the e… direction to produce more …
-this means you will get more … for the exothermic … and … product for the endothermic reaction
-if you raise the … the equilibrium will move in the … direction to try and … it
-this means you will get … products for the endothermic … and fewer … for the … reaction
-if you decrease the temperature the equilibrium will move in the exothermic direction to produce more heat
-this means you will get more products for the exothermic reaction and fewer product for the endothermic reaction
-if you raise the temperature the equilibrium will move in the endothermic direction to try and decrease it
-this means you will get more products for the endothermic reaction and fewer products for the exothermic reaction
How do reversible reactions try to counteract changes in pressure
-changing the … only affects … involving …
-if you … the pressure the … tries to reduce it so it … in the … where there are … molecules of …
-if you decrease the … the equilibrium tries to … it, so it moves in the … where there are … molecules of gas
-changing the pressure only affects equilibrium involving gases
-if you increase the pressure the equilibrium tries to reduce it so it moves in the direction where there are fewer molecules of gas
-if you decrease the pressure the equilibrium tries to increase it, so it moves in the direction where there are more molecules of gas
How do reversible reactions try to counteract changes in concentration
-if you change the … of the reactants or the … the system is … longer at …
-if you … the conc of the … the system tries to decrease it by making … products
-if you decrease the … of the products the system tries to … it by … the amount of reactants
-if you change the concentration of the reactants or the products the system is no longer at equilibrium
-if you increase the conc of the reactants the system tries to decrease it by making more products
-if you decrease the conc of the products the system tries to increase it by reducing the amount of reactants
