4.2 Reversible Reactions & Equilibria
No description yet. This curated deck is ready for daily study.
Card preview (17)
Reversible reaction
A reaction where the products can react with each other to produce the reactants
Explain how a reversible reaction reaches equilibrium
As the reactants react, their concentrations fall so the forward reaction slows down. But as more of the products are made their concentrations rise and the backward reaction will speed up. They will eventually be going at exactly the same rate.
Dynamic equilibrium
The forward and backward reactions are both happening at the same rate
Does the concentrations of substances in dynamic equilibrium change
No
What is needed for a reaction to reach equilibrium
-Must be reversible -Must be in a closed system
What does it mean if the position of an equilibrium lies on the right
Lots of products and not many reactants
What does it mean if the position of the equilibrium lies on the left
Lots of reactants and not many products
Factors affecting the position of equilibrium
-Temperature -Pressure -Concentrations
When is pressure a factor of the position of a reversible reaction’s equilibrium position
If a gas is involved
Le Chatalier’s Principle
If there’s a change in conditions in a reversible reaction, the equilibrium position will move to counteract that change
State the types of energy changes in a reversible reaction
One direction will be exothermic and the other will be endothermic
Explain what happens if you decrease the temperature of a reversible reaction
The equilibrium will move in the exothermic direction to produce more heat
Explain what happens if you increase the temperature of a reversible reaction
The equilibrium will move in the endothermic direction to absorb extra heat
Explain what happens if you decrease the pressure of a reversible reaction
The equilibrium will move towards the side that has more molecules of gas to increase the pressure
Explain what happens if you increase the pressure of a reversible reaction
The equilibrium will move towards the side with fewer molecules of gas to reduce pressure
Explain what happens if you increase the concentration of the reactants of a reversible reaction
The equilibrium will move to the right to use more reactants
Explain what happens if you increase the concentration of the products of a reversible reaction
The equilibrium will move to the left to use up the products