An exothermic reaction is allowed to reach equilibriuim. If heat energy is removed then, the equilibrium will shift?
Correct answer: A. To the product side.
- A. To the product side.
- B. To reactant side.
- C. Toward the middle.
- D. None of these.
Explanation
Correct option is A.The answer is to the product side.Le Chatelier's principle states that when a system at equilibrium is disturbed, the system will shift in a way to minimize the disturbance. In the case of an exothermic reaction, heat is a product of the reaction. If heat is removed from the system, the equilibrium will shift to the product side to produce more heat and minimize the disturbance.Here is a diagram that illustrates how the equilibrium will shift:Initial equilibrium[Products] [Reactants]Heat is removed[Products] ↑ [Reactants]The equilibrium will shift to the product side until the concentration of the products increases enough to offset the loss of heat.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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