Equilibrium Constant

Front

What is the equilibrium constant (Kc)?

Back

The equilibrium constant (Kc) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium for a reversible chemical reaction at a given temperature.

Front

How does changing the pressure affect the equilibrium constant (Kc)?

Back

Changing the pressure by altering the volume of the container does not affect the value of Kc, as Kc is only influenced by temperature.

Front

What does it mean if Kc is much greater than 1?

Back

If Kc is much greater than 1, it indicates that at equilibrium, the concentration of products is much greater than that of reactants, favoring the forward reaction.

Front

What does it mean if Kc is much less than 1?

Back

If Kc is much less than 1, it indicates that at equilibrium, the concentration of reactants is much greater than that of products, favoring the reverse reaction.

Front

Write the equilibrium constant expression for the reaction: N2O4(g) ↔ 2 NO2(g).

Back

Kc = [NO2]^2 / [N2O4]

Front

What is the effect of temperature on the equilibrium constant (Kc)?

Back

The value of Kc changes with temperature; an increase in temperature favors the endothermic direction of the reaction, while a decrease favors the exothermic direction.

Front

Define dynamic equilibrium in the context of chemical reactions.

Back

Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction, resulting in constant concentrations of reactants and products.

Front

What is Le Chatelier's Principle?

Back

Le Chatelier's Principle states that if a system at equilibrium is subjected to a change in concentration, pressure, or temperature, the system will adjust to counteract that change and restore a new equilibrium.

Front

How can you determine which reactant is favored at equilibrium?

Back

The reactant favored at equilibrium can be determined by comparing the concentrations of reactants and products; if the concentration of a reactant decreases, it is favored.

Front

What is the significance of the reaction quotient (Q)?

Back

The reaction quotient (Q) is a measure of the relative concentrations of products and reactants at any point in time; it helps predict the direction in which a reaction will proceed to reach equilibrium.