Which of the following principle/rule is applicable at equilibrium?
Correct answer: C. Le-Chatelier's Principle
- A. Law of mass action
- B. Pauli's Exclusion Principle
- C. Le-Chatelier's Principle
- D. Hund's Rule
Explanation
The correct answer is Le-Chatelier's Principle, which provides insight on how a system at equilibrium responds to external changes. This principle is essential for predicting shifts in equilibrium concentrations when conditions change.Law of mass action is related to equilibrium but does not specifically address how the system responds to changes, making it less relevant in this context. Pauli's Exclusion Principle and Hund's Rule are both principles from quantum mechanics that pertain to electron configurations and are not applicable to chemical equilibrium.
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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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