For the equilibrium reaction A(g) + B(g) ⇌ C(g), if the temperature is decreased

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Question: For the equilibrium reaction A(g) + B(g) ⇌ C(g), if the temperature is decreased and the reaction is endothermic, what will happen?

Options:

Correct Answer: Shift to the right

Solution:

Decreasing the temperature of an endothermic reaction shifts the equilibrium to the right, favoring the formation of products.

For the equilibrium reaction A(g) + B(g) ⇌ C(g), if the temperature is decreased and the reaction is endothermic, what will happen?

For the equilibrium reaction A(g) + B(g) ⇌ C(g), if the temperature is decreased and the reaction is endothermic, what will happen?

Step 1: Understand that an endothermic reaction absorbs heat from the surroundings.
Step 2: Recognize that the reaction A(g) + B(g) ⇌ C(g) can be affected by temperature changes.
Step 3: Know that decreasing the temperature means removing heat from the system.
Step 4: Apply Le Chatelier's Principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
Step 5: Since the reaction is endothermic, removing heat will shift the equilibrium to the right to produce more heat.
Step 6: Conclude that the equilibrium will shift towards the products (C(g)) when the temperature is decreased.

Le Chatelier's Principle – This principle states that if a system at equilibrium is subjected to a change in temperature, pressure, or concentration, the system will adjust to counteract that change and restore a new equilibrium.
Endothermic Reactions – Endothermic reactions absorb heat, meaning that lowering the temperature will shift the equilibrium towards the reactants.