Unit 1 - Equillibrium Flashcards
What are Reversible reactions
Reactants can make products, and products can make reactants simultaneously.
A chemical reaction will tend to go in the direction where energy is given off.
Entropy def
Disorder, randomness or freedom of movement
Entropy in the states of matter:
Solid
The 5 Conditions for equilibrium
- Reaction must be reversible
- Reaction can start with products or reactants
- System must be closed
- Temperature must remain constant
- Forward reaction rate must equal the reverse reaction rate
Equilibrium constant
Concentration is expressed through what unit
Molarity
Molar
moles/L
M
What is the constant expression used for equilibrium
Keq
What states of matter aren’t included in keq equations
Liquids and solids
Rules of the rice table
Change is always affected by the reaction ratio
If units in moles what do you do
Divide the moles by litres
Le chateliers principle
Written rule
If equilibrium is disturbed by a stress in the system, the equilibrium shifts to counteract
Pressure only effects gases
Le chateliers principle:
What happens when you Increase concentration of a reactant
It will react with its coexisting reactant
Therefore equilibrium shifts to the right
Le chateliers principle:
What happens if you decrease the concentration of a reactant?
It will react with its coexisting reactant to counteract the change, and will shift the equilibrium to the left
Le chateliers principle:
Increased pressure
Position of equilibrium will shift to REDUCE pressure (shifts to right)
Le chateliers principle:
Decrease pressure
Equilibrium shifts to increase pressure by producing more molecules (shifts to left)
Le chateliers principle:
Increase temp
Equilibrium shifts to left
Le chateliers principle:
Decrease temp
Equilibrium shifts right, producing more products
