Equilibria Flashcards
Define when a reaction is at equilibrium
When the rate of the forward and reverse reaction are equal and the concentration of reactants and products remain constant.
Define dynamic equilibrium
When the forward and reverse reactions still occur, but at equal rates.
When can equilibrium be established
in a closed system
If the concentration of reactants is greater than the products at equilibrium, where does the equilibrium lie
To the left
If the concentration of the reactants is less than the products at equilibrium, where does the equilibrium lie
To the right
When adding a reactant or removing a product
Equilibrium shifts right
When adding a product or removing a reactant
Equilibrium shifts left
When increasing pressure
Equilibrium shifts to the side with the least gaseous moles
When decreasing pressure
Equilibrium shifts to the side with the most gaseous moles
If both sides have the same gaseous moles, where is equilibrium
the equilibrium is dynamic
When increasing temperature
Equilibrium shifts to endothermic reaction
When decreasing temperature
Equilibrium shifts to exothermic reaction
+ deltaH reaction
forward reaction is endothermic
negative deltaH reaction
forward reaction is exothermic
2 effects of catalyst
A catalyst will never change the position of equilibrium
It will only change how fast equilibrium is attained
