ES4: Equilibrium Flashcards
When is it that a “dynamic equilibrium” is reached?
When the rate of the forward reaction is the same as the rate of the reverse reaction
Why is it nothing appears to change on the surface in a reaction in a dynamic equilibrium?
The ratio of products: reactants remains constant
What is Kc?
- The equilibrium constant for a reaction
- A measure of the ratio of products to reactants at equilibrium
What type of system can a dynamic equilibrium be reached in?
A closed system
What is a closed system?
A system where no matter is transferred to or from surroundings
Why does it not matter if you start with reactants or products in a dynamic equilibrium reaction?
In the end the same equilibrium position is reached
What happens when reactants get used up in a dynamic equilibrium reaction?
Forward reaction slows down
What happens when products get made in a dynamic equilibrium reaction?
Reverse reaction speeds up
What is the formula for Kc?
[D]^x multiplied by [C]^x
If A+BC+D
[A]^x multiplied by [B]^x
(^x= to the power of stoichiometry)
What does it mean if Kc is far larger than 1?
- Equilibrium lies far to the right
- Far greater amount of product than reactants
What does it mean if Kc is larger than 1?
- Equilibrium lies to the right
- Greater amount of product than reactants
What does it mean if Kc is the same as 1 ?
- Equilibrium lies in the middle
- Same amount of product as reactants
What does it mean if Kc is smaller than 1?
- Equilibrium lies to the left
- Lesser amount of product than reactants
What does it mean if Kc is far smaller than 1?
- Equilibrium lies far to the left
- Far lesser amount of product than reactants
