Question

According to Le Chatelier’s principle, which statement is true?

A) The equilibrium constant is unchanged by temperature changes.
B) The equilibrium constant changes with a change in temperature.
C) The equilibrium constant increases with the concentration of reactants.
D) The equilibrium constant decreases with the concentration of products.
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Answer 1

Answer and Explanation:

According to Le Chatelier's principle, the correct statement is B) The equilibrium constant changes with a change in temperature.

Le Chatelier's principle states that when a system at equilibrium is subjected to a change in temperature, pressure, or concentration, the system will adjust to counteract the change and reestablish equilibrium. In the case of a change in temperature, the equilibrium constant (K) of a chemical reaction can be affected.

When the temperature of a system at equilibrium increases, the reaction is considered endothermic, meaning it absorbs heat. To counteract the increase in temperature, the system will shift in the direction that absorbs heat. This results in a change in the concentrations of the reactants and products, which affects the equilibrium constant.

Conversely, when the temperature decreases, the reaction is considered exothermic, meaning it releases heat. The system will shift in the direction that releases heat to counteract the decrease in temperature. Again, this affects the concentrations of the reactants and products, thus changing the equilibrium constant.

Therefore, it is true that the equilibrium constant changes with a change in temperature, as stated in option B.

Answer 2

The equilibrium constant changes with a change in temperature.

Step-by-step explanation:

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 to reestablish an equilibrium.

some examples of how Le Chatelier's principle can be applied:

• Changing the concentration of a reactant or product
• Changing the pressure of a system.
• Changing the temperature of a system.

Equilibrium constants aren't changed if you change the concentrations of things present in the equilibrium. The only thing that changes an equilibrium constant is a change of temperature.