C8.9 Altering Conditions Flashcards
What happens if the forward reaction produces more molecules of gas?
This means there are more molecules of gas on the products side
What happens if pressure is increased whilst there are more molecules of gas on the product’s side?
Decreases the amount of products formed as products start to from reactants
What happens if the forward reaction produces fewer molecules of gas?
This means there are more reactants
What happens if there is an increase in pressure whilst there are more molecules on the reactant’s side?
Decreases the pressure on the reactant side by forming more molecules of product
What is Le Chatelier’s Principle?
If a system is at equilibrium and a change is made to the conditions - then the system responds to counteract the change
What happens if there is a change in pressure when there are equal numbers of molecules of gas on both sides of the balance equation?
Has no effect on the composition of the equilibrium mixture
But increasing the pressure will speed up both the forward and reverse reactions by the same amount
If the forward reaction is exothermic what happens if there is an increase in temperature?
Endothermic absorbs the energy and since it is a forward reaction it produces more reactants due to the equilibrium being shifted to the left
What happens if the forward reaction is exothermic and the temperature is increased?
More energy is released into the surroundings this leads to more products - but then it has to shift to the left to make more reactants because of Le chatliers principle - therefore less products
What happens if the forward reaction is endothermic and the temperature is decreased?
A decrease in temperature increases the amount of reactants formed
What happens if the forward reaction is exothermic and there is a decrease in temperature?
There will be more reactants than products - then it will shift to the right to form more products
