Quiz 1 Flashcards
What happens and what direction does a rxn at equilibrium go when you add reactants?
To the right and produces more products
What happens and what direction does a rxn at equilibrium go when you remove reactants?
To the left and produces more reactants
What happens and what direction does a rxn at equilibrium go when you add products?
To the left and produces more reactants
What happens and what direction does a rxn at equilibrium go when you remove products?
To the right and produces more products
Heating an exothermic reaction
Equilibrium shifts towards the reactants and K decreases
Heating an endothermic reaction
Equilibrium shifts towards the products and K increases
Q<K
Shifts right and produces products (reactants consumed)
Q>K
Shift left and consumes products (produces reactants)
Small K
Left, reactants increase and products decrease
Large K
Right, reactants decrease and products increase
Cooling an exothermic reaction
Moves to the right and produces more products and K increases
Cooling an endothermic reaction
Moves to the left and produces more reactants and K decreases
Le Chatelier’s Principle
Added stress @equilibrium = shifts in direction to reduce change
Q=K
equilibrium and no change
Equilibrium
A rxn will continue going in the forward and reverse direction because concentration and pressure are no longer changing
Equilibrium constant
Relationship between products and reactants at equilibrium (P/R)
Equilibrium position
Concentration of each molecule at equilibrium based on initial concentration
There are an _____ number of initial concentration and equilibrium positions
Infinite
What does the equilibrium constant depend on?
Temperature
What does the equilibrium position depend on?
Temperature, pressure, and/or initial concentrations
What is the equilibrium constant (K) for a reverse reaction?
K’ = 1/K
What is the equilibrium constant (K) if the rxn is multiplied by a factor n?
K” = K^n
Kc = Kp(RT)^?
-Δn
Kp = Kc(RT)^?
+Δn
