Equilibrium

What happens to the equilibrium position when temperature is decreased in an exothermic reaction?

• The equilibrium position shifts to the left, favoring the formation of reactants.

• The equilibrium position remains unchanged.

• The equilibrium position shifts to the right, favoring the formation of products.

• The equilibrium position shifts to the left, favoring the formation of products.

What is an irreversible reaction?

• A reaction that can proceed in both directions

• A reaction that only occurs at high temperatures

• A chemical reaction that proceeds in one direction only, with reactants converting to products without reverting back.

• A reaction that produces energy without any reactants

In which state of matter do changes in pressure affect equilibrium?

• Solid state

• Liquid state

• Gaseous state

• Plasma state

What is dynamic equilibrium?

• A state where the forward reaction is faster than the reverse reaction.

• A state in which the rate of the forward reaction equals the rate of the reverse reaction, resulting in no net change in the concentration of reactants and products.

• A condition where all reactants are completely converted to products.

• A temporary state before reaching a complete reaction.

What is the effect of dilution on the equilibrium position of a reaction involving aqueous solutions?

• Dilution has no effect on the equilibrium position.

• Dilution shifts the equilibrium position towards the side with fewer solute particles.

• Dilution shifts the equilibrium position towards the side with more solute particles.

• Dilution always favors the formation of products.

What is the significance of ΔH in a chemical reaction?

• ΔH indicates the temperature change during a reaction.

• ΔH represents the change in enthalpy, indicating whether a reaction is exothermic (negative ΔH) or endothermic (positive ΔH).

• ΔH measures the concentration of reactants and products.

• ΔH is the rate at which a reaction occurs.

What is the role of concentration in shifting equilibrium?

• Changing the concentration of reactants or products will shift the equilibrium position to counteract the change.

• Concentration has no effect on the equilibrium position.

• Increasing concentration of products will always shift equilibrium to the left.

• Decreasing concentration of reactants will always shift equilibrium to the right.

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 will shift to counteract the change.

• Le Chatelier's Principle states that all chemical reactions are reversible.

• Le Chatelier's Principle states that the rate of a reaction is proportional to the concentration of the reactants.

• Le Chatelier's Principle states that temperature changes do not affect equilibrium.

How does temperature affect the position of equilibrium in an endothermic reaction?

• Increasing temperature shifts the equilibrium position to the left, favoring the formation of reactants.

• Increasing temperature has no effect on the position of equilibrium.

• Increasing temperature shifts the equilibrium position to the right, favoring the formation of products.

• Decreasing temperature shifts the equilibrium position to the right, favoring the formation of products.

What does a double arrow (⇌) in a chemical equation indicate?

• It indicates that the reaction is irreversible.

• It indicates that the reaction is exothermic.

• It indicates that the reaction is reversible.

• It indicates that the reaction is endothermic.