The activation energy for forward and reverse reaction can be lowered by?
Correct answer: C. Catalyst
- A. Lowering temperature
- B. Decreasing pressure
- C. Catalyst
- D. All of these
Explanation
The correct answer is that a catalyst lowers the activation energy for both forward and reverse reactions by providing an alternative pathway. This accelerates the reaction without changing the equilibrium. Lowering temperature generally slows reactions and does not affect activation energy, while decreasing pressure impacts the rate by changing concentrations but not the activation energy. Hence, only a catalyst effectively reduces the activation energy.
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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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