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In a reversible reaction at equilibrium, what happens if the temperature is incr

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Question: In a reversible reaction at equilibrium, what happens if the temperature is increased? (2019)

Options:

  1. The reaction shifts to the exothermic side
  2. The reaction shifts to the endothermic side
  3. No change occurs
  4. The reaction rate decreases

Correct Answer: The reaction shifts to the endothermic side

Exam Year: 2019

Solution: 

Increasing the temperature of an exothermic reaction shifts the equilibrium to the left (towards the reactants), while for an endothermic reaction, it shifts to the right (towards the products).

In a reversible reaction at equilibrium, what happens if the temperature is incr

Practice Questions

Q1
In a reversible reaction at equilibrium, what happens if the temperature is increased? (2019)
  1. The reaction shifts to the exothermic side
  2. The reaction shifts to the endothermic side
  3. No change occurs
  4. The reaction rate decreases

Questions & Step-by-Step Solutions

In a reversible reaction at equilibrium, what happens if the temperature is increased? (2019)
  • Step 1: Understand that a reversible reaction can go in two directions: from reactants to products and from products to reactants.
  • Step 2: Know that reactions can be classified as exothermic (release heat) or endothermic (absorb heat).
  • Step 3: If the temperature of an exothermic reaction is increased, the system will try to counteract this change by favoring the direction that absorbs heat, which is towards the reactants (left).
  • Step 4: If the temperature of an endothermic reaction is increased, the system will favor the direction that produces heat, which is towards the products (right).
  • Step 5: Remember that increasing temperature affects the position of equilibrium based on whether the reaction is exothermic or endothermic.
  • Le Chatelier's Principle – This principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.
  • Exothermic vs Endothermic Reactions – Understanding the difference between exothermic (releases heat) and endothermic (absorbs heat) reactions is crucial for predicting the effect of temperature changes on equilibrium.
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