Equilibria Flashcards
What is dynamic equilibrium
When the two rates pf reaction - both forward and backward - are equal and a state fo balance is formed
What is a closed system
An equillibrium can only be establoished where no reactants or products can escape - this is known as a closed system
When we say that the equilibrium of a reaction lies to the right what does that mean
In some reactions equilibrium is not reache duntil the forward reaction is nearly complete - here we say the equilibrium lies to the right
When we say that the equilibrium of a reaction lies to the left what do we mean
In some reaction equilibrium can be reached early in the reaction - we say here that the equilibrium lies to the left
Describe the equilibrium position of a reversible raction
For a reversible reaction which forms an equilibrium, the same equilibrium position is reached regardless of wether we start from reactants or products
Describe the effect of concentration on the equilibrium
Increasing the conc. of reactants shift the equillibrium position to the right i.e. more product is formed
Addign product shofts the equilibrium position to the left i.e. more reactant is formed
How does changing the pressure effect the equillibrium
increasing pressure causes an equilibrium to move towards where there are feewer moles of gas molecules
When will changing pressure have no effect on the equilibrium
if there are no gases in the equilibrium
if there are the same no. of moles either side of the equilibrium
How does temp effect the equilibrium
For a system n equilibrium, a rise in temp favours the endothermic reaction. A decrease in temperature favours the exothermic
What happens if a sysstem at equilibrium is subjected to a change?
the system will adjust to oppose the effect of the change
