In a reaction at equilibrium, if the temperature is increased and the reaction i

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Question: In a reaction at equilibrium, if the temperature is increased and the reaction is exothermic, what will happen? (2021)

Options:

Correct Answer: Shift to the left

Exam Year: 2021

Solution:

For an exothermic reaction, increasing the temperature shifts the equilibrium to the left, favoring the reactants.

In a reaction at equilibrium, if the temperature is increased and the reaction is exothermic, what will happen? (2021)

In a reaction at equilibrium, if the temperature is increased and the reaction is exothermic, what will happen? (2021)

Step 1: Understand what equilibrium means. It is a state where the forward and reverse reactions occur at the same rate.
Step 2: Identify that an exothermic reaction releases heat. This means heat is a product of the reaction.
Step 3: Recognize that increasing the temperature adds heat to 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 we added heat (increased temperature) to an exothermic reaction, the system will try to reduce the heat by shifting the equilibrium to the left, favoring the reactants.

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.
Exothermic Reactions – In exothermic reactions, heat is released, and increasing temperature can shift the equilibrium position towards the reactants.