Le Chatelier's Principle Flashcards
(35 cards)
What is Le Chatelier’s principle?
Le Chatelier’s principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.
True or False: Increasing the concentration of a reactant shifts the equilibrium to the right.
True
What effect does decreasing the volume of a gas mixture have on equilibrium?
Decreasing the volume shifts the equilibrium towards the side with fewer moles of gas.
Fill in the blank: According to Le Chatelier’s principle, if the temperature of an exothermic reaction is increased, the equilibrium will shift to the __________.
left
How does increasing the concentration of products affect the equilibrium position?
It shifts the equilibrium to the left, favoring the formation of reactants.
What happens to equilibrium when a catalyst is added?
A catalyst does not affect the position of equilibrium; it only speeds up the rate at which equilibrium is reached.
True or False: Decreasing the temperature of an endothermic reaction shifts the equilibrium to the right.
False
In a reaction with equal moles of gas on both sides, what is the effect of changing the volume?
There is no effect on the position of equilibrium.
What is the effect of increasing temperature on an endothermic reaction?
It shifts the equilibrium to the right, favoring product formation.
Multiple Choice: What happens when the concentration of a reactant is decreased?
A) The equilibrium shifts to the right B) The equilibrium shifts to the left C) No change D) The reaction stops
What is a dynamic equilibrium?
A dynamic equilibrium is a state in which the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.
Fill in the blank: An increase in pressure will shift the equilibrium towards the side with __________ moles of gas.
fewer
True or False: Adding an inert gas to a reaction at constant volume affects the equilibrium position.
False
What happens to the equilibrium position if both reactants and products are increased equally?
There is no change in the position of equilibrium.
What type of reaction is favored by decreasing temperature?
Exothermic reactions are favored by decreasing temperature.
Multiple Choice: Which of the following will NOT change the position of equilibrium?
A) Change in concentration B) Change in temperature C) Addition of a catalyst D) Change in pressure
How does a shift to the right affect the concentrations of reactants and products?
It increases the concentration of products and decreases the concentration of reactants.
Define ‘shift to the left’ in terms of equilibrium.
A shift to the left means that the reaction favors the formation of reactants over products.
True or False: The position of equilibrium can be affected by changes in temperature, pressure, and concentration.
True
What is the effect of increasing pressure on a reaction with more moles of gas on the reactants side?
It shifts the equilibrium to the left.
Fill in the blank: A __________ reaction absorbs heat from the surroundings.
endothermic
What is the relationship between the direction of the shift and the nature of the reaction (endothermic/exothermic)?
For endothermic reactions, increasing temperature shifts right; for exothermic reactions, it shifts left.
Multiple Choice: What effect does a decrease in temperature have on an exothermic reaction?
A) Shifts right B) Shifts left C) No effect D) Reaction stops
What is the impact of dilution on the equilibrium of a reaction involving aqueous solutions?
Dilution decreases the concentration of all species, potentially shifting equilibrium depending on the relative changes.
