Equilibria Flashcards
When can you use Le Chatelier’s Principle
When the reaction is reversible
What occurs in a reversible reaction at equilibrium
Forward and reverse reactions occur at equal rates.
Concentrations of reactants and products stay constant
Effect of temperature on reversible reaction
If the reaction is endothermic, the relationship is proportional
Effect of concentration on reversible reaction
Increasing the concentration of a reactant shifts the equilibrium to the right
Effect of pressure on reversible reaction by change of volume
Increasing the pressure shifts the equilibrium to the side with fewer gas moles
Effect of catalyst on reversible reaction
No effect on the position of equilibrium
What is concentration measured in
mol dm^-3
Describe how to calculate the equilibrium constant
Products over Reactants
Powers of moles
All parts are multiplied
What affects the equilibrium constant
Temperature. If equilibrium shifts to the right, the constant increases
What doesn’t affect the equilibrium constant
Concentration and catalyst
Why does industry find the equilibrium useful
If the product yield is very small, yield does not justify cost of producing high temp
What does dynamic mean in dynamic equilibrium
Both reactions always occur and never stop
