Le Chatelier's principle

Question 1

What is Le Chatelier’s principle is

Answer 1

the idea that if you change the conditions of a reversible reaction at equilibrium , the system will try to counteract that change

it can be used to predict the effect of any changes to make to a reaction system

Question 2

What happens to the equilibrium if you decrease the temperature

Answer 2

If you decrease the temperature , the equilibrium will move the exothermic to produce more heat

means you’ll get more products for the exothermic reaction and fewer products for endothermic reaction

Question 3

What happens to the equilibrium if you increase the temperature

Answer 3

If you raise the temperature , the equilibrium will move in the endothermic direction to try and decrease it. You’ll now get more products for the endothermic reaction and fewer for exothermic

Question 4

What happens if you increase pressure in gases to the equilibrium

Answer 4

If you increase the pressure the equilibrium will try to reduce this -

it moves in the direction where there are fewer molecules of gas

Question 5

What happens if you decrease pressure in gases to the equilibrium

Answer 5

If you decrease the pressure the equilibrium tries to increase it

it moves in the direction where there are more gas molecules

Question 6

What happens to the equilibrium if you change the concentrations

Answer 6

If you change the concentrations of the reactants or the products the system will no longer be at equilibrium

so system responds to bring itself back to equilibrium again

Question 7

So if you increase concentration of reactants in the system

Answer 7

It tries to decrease it by making more reactants

Question 8

So if you decrease concentration of products in the system

Answer 8

system tries to increase it by reducing amount of reactants