Representations of Equilibrium
Chemical equilibrium can be represented in multiple ways, each providing insights into the reaction status and composition of the system.
Key Representations
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Chemical Equation with Double Arrow
- A ⇌ B indicates dynamic equilibrium, with forward and reverse reactions occurring simultaneously.
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Concentration vs. Time Graph
- Shows how reactant and product concentrations stabilize over time.
- At equilibrium, concentrations remain constant.
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Reaction Quotient (Q) vs. Equilibrium Constant (K)
- Q = K → system at equilibrium
- Q < K → reaction shifts forward
- Q > K → reaction shifts reverse
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Energy Profile Diagram
- Illustrates reactant and product energies, activation energy, and ΔG at equilibrium.
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ICE Table (Initial, Change, Equilibrium)
- Provides systematic calculation of equilibrium concentrations using K.
Importance
- Helps visualize equilibrium behavior
- Supports quantitative calculations
- Facilitates understanding of Le Châtelier’s Principle and reaction manipulation
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