7.3 Le Chatelier Principle

Front

What is Le Chatelier's Principle?

Back

Le Chatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change and restore a new equilibrium.

Front

How does increasing the concentration of reactants affect equilibrium?

Back

Increasing the concentration of reactants shifts the equilibrium position to the right, favoring the formation of products.

Front

What effect does increasing temperature have on an endothermic reaction at equilibrium?

Back

Increasing temperature shifts the equilibrium position to the right, favoring the formation of products in an endothermic reaction.

Front

What happens to equilibrium when pressure is increased in a reaction with fewer moles of gas on the product side?

Back

The equilibrium shifts to the right, favoring the side with fewer moles of gas to reduce pressure.

Front

What is the effect of a catalyst on the position of equilibrium?

Back

A catalyst increases the rate of both the forward and reverse reactions equally, but it does not affect the position of equilibrium.

Front

Define 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, each raised to the power of their coefficients in the balanced equation.

Front

What is the effect of decreasing temperature on an exothermic reaction at equilibrium?

Back

Decreasing temperature shifts the equilibrium position to the right, favoring the formation of products in an exothermic reaction.

Front

How does the addition of inert gas at constant volume affect equilibrium?

Back

Adding an inert gas at constant volume does not affect the position of equilibrium, as it does not change the partial pressures of the reactants or products.

Front

What is the relationship between Kc and temperature?

Back

The value of Kc is temperature-dependent; changing the temperature will change the value of Kc for a given reaction.

Front

What does it mean if Kc > 1?

Back

If Kc > 1, it indicates that at equilibrium, the concentration of products is greater than that of reactants.