Factors Affecting Equilibrium

What is Le Chatelier's Principle?

• Le Chatelier's Principle describes how chemical systems respond to external disturbances.

• Le Chatelier's Principle is only applicable to biological systems

• Le Chatelier's Principle is a law of thermodynamics

• Le Chatelier's Principle states that reactions always proceed to completion

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How does a change in temperature affect the equilibrium position?

• A change in temperature has no effect on the equilibrium position

• A change in temperature causes the equilibrium position to remain constant

• A change in temperature leads to the equilibrium position reversing

• A change in temperature affects the equilibrium position by shifting it based on the reaction's endothermic or exothermic nature.

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Explain the effect of pressure changes on equilibrium.

• Pressure changes have no effect on equilibrium

• Pressure changes affect equilibrium by causing the system to shift to minimize the change in pressure.

• Pressure changes cause the equilibrium to shift in the opposite direction

• Pressure changes lead to an increase in the equilibrium constant

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Discuss the impact of adding a catalyst on a system at equilibrium.

• The position of equilibrium remains unchanged, but the system reaches equilibrium faster due to lower activation energy for both forward and reverse reactions.

• A catalyst increases the equilibrium constant of the reaction

• Adding a catalyst slows down the rate of reaching equilibrium

• The addition of a catalyst shifts the equilibrium towards the reactants

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What role does concentration play in shifting equilibrium?

• Concentration only affects equilibrium in gaseous reactions

• Concentration has no impact on shifting equilibrium

• Increasing concentration always shifts equilibrium to the left

• Concentration affects the position of equilibrium by shifting it towards the side with lower concentration.

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How does an increase in volume affect the equilibrium of a system?

• The equilibrium will shift towards the side with fewer moles of gas.

• The equilibrium will shift towards the side with more moles of gas.

• The equilibrium will remain unchanged.

• The equilibrium will shift towards the side with more solid reactants.

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Explain the concept of equilibrium constant.

• The equilibrium constant is a value that is only applicable to exothermic reactions.

• The equilibrium constant is a value that expresses the ratio of the concentrations of the reactants to the concentrations of the products at equilibrium for a chemical reaction.

• The equilibrium constant is a value that remains constant throughout a chemical reaction.

• The equilibrium constant is a value that expresses the ratio of the concentrations of the products to the concentrations of the reactants at equilibrium for a chemical reaction.

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What is the significance of the equilibrium constant in a reaction?

• The equilibrium constant is only applicable to reversible reactions

• The equilibrium constant is not affected by temperature changes

• The equilibrium constant represents the rate of the reaction

• The equilibrium constant signifies the ratio of products to reactants at equilibrium.

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Discuss the relationship between Q and K in determining the direction of a reaction.

• Q is always greater than K in determining the direction of a reaction

• Q and K are interchangeable in determining the direction of a reaction

• Q and K have no relationship in determining the direction of a reaction

• Q and K determine the direction of a reaction based on their relative values.

How do changes in temperature influence the equilibrium constant?

• Changes in temperature have no effect on the equilibrium constant

• Changes in temperature influence the equilibrium constant based on the reaction's enthalpy (∆H). For endothermic reactions, an increase in temperature increases the equilibrium constant, while for exothermic reactions, an increase in temperature decreases the equilibrium constant.

• The equilibrium constant increases with temperature for exothermic reactions

• An increase in temperature always decreases the equilibrium constant

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