Equilibrium Constant in Chemical Reactions

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9 Questions

How does a change in temperature affect the equilibrium constant for an exothermic reaction?

Decreases

Which factor does not affect the value of the equilibrium constant for a reaction at a given temperature?

Presence of a catalyst

What does the equilibrium constant measure for a chemical reaction?

The ratio of the concentrations of the products to the reactants at equilibrium

How does a change in pressure affect the equilibrium constant for a reaction at a given temperature?

It has no effect on the equilibrium constant

What does the equilibrium constant indicate for a chemical reaction at a given temperature?

The extent of the reaction at equilibrium

What happens to the equilibrium constant if the concentration of a reactant is increased?

It remains unchanged

Which statement is true regarding the equilibrium constant for a chemical reaction at a given temperature?

The equilibrium constant depends on the concentration of the reactants and products.

How does an increase in temperature affect the equilibrium constant for an endothermic reaction?

The equilibrium constant increases.

What is the significance of the equilibrium constant having a value much greater than 1 for a reaction at a given temperature?

The reaction proceeds nearly to completion.

Study Notes

Equilibrium Constant and Temperature

  • An increase in temperature decreases the equilibrium constant for an exothermic reaction.
  • An increase in temperature increases the equilibrium constant for an endothermic reaction.

Factors Affecting the Equilibrium Constant

  • The value of the equilibrium constant for a reaction at a given temperature is not affected by the concentration of reactants or products.

Equilibrium Constant and Chemical Reactions

  • The equilibrium constant measures the ratio of the concentrations of products to reactants at equilibrium for a chemical reaction.
  • The equilibrium constant indicates the extent to which a reaction will proceed towards the products or reactants at a given temperature.
  • If the equilibrium constant is much greater than 1, it indicates that the reaction strongly favors the products at a given temperature.

Pressure and Equilibrium Constant

  • A change in pressure does not affect the equilibrium constant for a reaction at a given temperature.

Statement about Equilibrium Constant

  • The equilibrium constant is a constant value for a reaction at a given temperature, and it does not change with the addition or removal of reactants or products.

Concentration of Reactants and Equilibrium Constant

  • Increasing the concentration of a reactant does not affect the equilibrium constant.

Test your knowledge of the equilibrium constant in chemical reactions. This quiz covers the measurement of equilibrium constant, its relationship with temperature changes in exothermic reactions, and factors that do not affect its value at a given temperature.

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