Reversible Reactions Flashcards
What is a reversible reaction?
A reaction that can go both forward and backwards
True or False: In a reversible reaction, the products can react to form the original reactants.
True
Fill in the blank: In a reversible reaction, the forward reaction and the reverse reaction reach a state of _______.
equilibrium
What symbol is commonly used to indicate a reversible reaction?
The double arrow (⇌)
Name one example of a reversible
The synthesis of ammonia (N₂ + 3H₂ ⇌ 2NH₃)
What is chemical equilibrium?
where the rates of the forward and reverse reactions are equal.
Multiple Choice: Which of the following is NOT a characteristic of reversible reactions? A) They can reach equilibrium B) They are usually exothermic C) The products can revert to reactants
B) They are usually exothermic
What factors can affect the position of equilibrium in a reversible reaction?
Concentration, temperature, and pressure.
True or False: Increasing the temperature always favors the exothermic direction of a reversible reaction.
False
Fill in the blank: In a reversible reaction, if the concentration of the reactants is increased, the equilibrium will shift to the _______.
right
What happens to the equilibrium position when pressure is increased in a reaction involving gases?
It shifts towards the side with fewer moles of gas.
True or False: Reversible reactions can occur in both directions without any external influence.
True
Multiple Choice: Which reaction condition does NOT affect the equilibrium position? A) Changing the temperature B) Adding a catalyst C) Changing the concentration
B) Adding a catalyst
What is the significance of the equilibrium constant (K) in reversible reactions?
It quantifies the ratio of concentrations of products to reactants at equilibrium.
Fill in the blank: The equilibrium constant expression for the reaction aA + bB ⇌ cC + dD is _______.
K = [C]^c [D]^d / [A]^a [B]^b
Short Answer: How does a decrease in temperature affect an exothermic reversible reaction?
It shifts the equilibrium to the right, favoring the production of products.
What is a dynamic equilibrium?
A state where the forward and reverse reactions continue to occur at equal rates.
True or False: All reactions are reversible.
False
Multiple Choice: In which type of reaction is the equilibrium constant greater than 1? A) Reactions favoring reactants B) Reactions favoring products C) Reactions with equal concentrations
B) Reactions favoring products
What is the role of a catalyst in a reversible reaction?
It speeds up both the forward and reverse reactions equally without affecting the position of equilibrium.
Fill in the blank: A reversible reaction can be represented using the _______ arrow.
double
Short Answer: What does it mean for a reaction to be at equilibrium?
The concentrations of reactants and products remain constant over time.
What is the effect of increasing the concentration of products on the equilibrium position?
It shifts the equilibrium to the left, favoring the formation of reactants.
