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In the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), what effect does increasing the tempe

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Question: In the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), what effect does increasing the temperature have if the reaction is exothermic? (2020)

Options:

  1. Shifts equilibrium to the right
  2. Shifts equilibrium to the left
  3. No effect on equilibrium
  4. Increases the rate of reaction

Correct Answer: Shifts equilibrium to the left

Exam Year: 2020

Solution: 

For an exothermic reaction, increasing the temperature shifts the equilibrium to the left, favoring the reactants, as the system tries to absorb the added heat.

In the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), what effect does increasing the tempe

Practice Questions

Q1
In the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), what effect does increasing the temperature have if the reaction is exothermic? (2020)
  1. Shifts equilibrium to the right
  2. Shifts equilibrium to the left
  3. No effect on equilibrium
  4. Increases the rate of reaction

Questions & Step-by-Step Solutions

In the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), what effect does increasing the temperature have if the reaction is exothermic? (2020)
  • Step 1: Understand that the reaction CO(g) + 2H2(g) ⇌ CH3OH(g) is exothermic, meaning it releases heat.
  • Step 2: Recognize that in an exothermic reaction, heat can be considered a product.
  • Step 3: When the temperature is increased, it adds heat to the system.
  • Step 4: According to Le Chatelier's principle, the system will try to counteract this change by shifting the equilibrium.
  • Step 5: To absorb the extra heat, the equilibrium shifts to the left, favoring the reactants (CO and H2).
  • Step 6: This means that less CH3OH is produced when the temperature is increased.
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