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reversible reaction
a reaction were the products can also form the reactants. If one direction is exothermic, the other one is always endothermic
exothermic
transfers energy to the surroundings
endothermic
takes in energy from surrounding
equilibrium
when the forward and backward reaction in a reversible reaction happen at the same rate in a sealed container
le chatelier’s principle
when a change of conditions happens to a system at equilibrium, the position of equilibrium moves to cancel out the change
If the concentration of a system at equilibrium is increased, what happens to the equilibrium?
equilibrium shifts to opposite side of substance which has increased concentration
If the concentration of a system at equilibrium is decreased, what happens to the equilibrium?
equilibrium shifts to the side of substance which has decreased concentration
(for gaseous reactions)
If the pressure of a system at equilibrium is increased, what happens to the equilibrium?
the equilibrium position will shift towards the side with the smaller number of molecules
(for gaseous reactions)
If the pressure of a system at equilibrium is decreased, what happens to the equilibrium?
the equilibrium position will shift towards the side with the larger number of molecules
If the temperature of a system at equilibrium is increased, what happens to the equilibrium?
equilibrium shifts to the endothermic side to increase products
the products at the exothermic side decrease
If the temperature of a system at equilibrium is decreased, what happens to the equilibrium?
equilibrium shifts to the exothermic side to decrease products
the products at the endothermic side increase
The equilibrium mixture is cooled.
Explain what happens to the concentration of the pink cobalt compound. [3]
concentration increases
because equilibrium moves to the left
because the reverse reaction is exothermic