chemical equilibrium
Let an agent explain chemical equilibrium and its thermodynamic basis, relay equilibrium constants and Le Chatelier principle, describe special cases, and support calculation and teaching.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain chemical equilibrium and its thermodynamic basis, relay equilibrium constants and Le Chatelier principle, describe special cases, and support calculation and teaching.
The state of a reversible chemical reaction in which forward and reverse rates are equal so that concentrations of reactants and products remain constant, a dynamic equilibrium described by the equilibrium constant and shifted by changes in concentration, pressure or temperature according to Le Chatelier principle, with special cases including solubility, dissociation of weak electrolytes, partition and phase equilibria and the Gibbs-Donnan effect across membranes; chemical equilibrium underlies acid-base chemistry, industrial synthesis and biochemistry.
What it is for: Not applicable; a chemical state.
It can be explain the concept and basis; relay constants and principles; describe special cases; support calculation.
Distinguishing features
Dynamic balance
Equilibrium constant
Le Chatelier response
Free energy minimum
What it looks like
Not a visible object; constant concentrations in a reacting system.
How it is recognised
Balanced forward and reverse reaction rates
Solubility, dissociation, partition, phase and Donnan equilibria
A steady state involves constant flow, not equal rates; completion means no reverse reaction
Related models
is a kind of - in registry terms
is a kind of - in registry terms, loosely
is described by - K
is governed by - minimisation
In practice
Families and kinds
homogeneous and heterogeneous equilibria
acid-base and dissociation equilibria of weak electrolytes
solubility equilibria
partition and distribution equilibria
phase equilibria
Gibbs-Donnan membrane equilibria
complexation and redox equilibria
Standards and regulation
IUPAC definitions and conventions
No regulation
Failure modes and hazards
Confusing equilibrium with completion or steady state
Misapplying Le Chatelier to catalysts
Unit and activity errors in constants
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What equilibrium is.
Science.
Definition
Definition.
Definition
Definition.
- What is chemical equilibrium, and why is it dynamic? definition
- Is the system at equilibrium, at steady state or reacting to completion? boundary
Thermodynamics
Thermodynamic basis.
Thermodynamics
Thermodynamics.
- How do free energy and the equilibrium constant relate? definition
- Which entry fits Gibbs free energy? action
Apply Principles and calculation.
Practice.
Le Chatelier
Shifting equilibria.
Le Chatelier
Le Chatelier.
- How do changes in concentration, pressure and temperature shift equilibria? provenance
- Which references are standard? provenance
Calculation
Calculations.
Calculation
Calculation.
- How are equilibrium concentrations calculated from constants, including ICE tables? action
- Which entry fits equilibrium constant? action
Cases Special cases.
Science.
Solution
Solution equilibria.
Solution
Solution.
- How do acid-base, solubility and partition equilibria work? provenance
- Which entry fits the specific equilibrium? action
Membrane
Phase and membrane equilibria.
Membrane
Membrane.
- What are phase equilibria and the Gibbs-Donnan effect, and where do they matter? provenance
- Which sources are cited? provenance
Context Industry and history.
Context.
Industry
Industrial equilibria.
Industry
Industry.
- How is equilibrium managed in processes such as ammonia synthesis? provenance
- Which entry fits the Haber process? action
History
History.
History
History.
- How did Berthollet, Guldberg, Waage, van t Hoff and Le Chatelier develop the concept? provenance
- Which entry fits the history of chemistry? action
What the second pass must settle
- Should solubility equilibrium and Donnan effect be separate entries?
- How should reference data be linked?
- The registry entry has merged aliases naming special cases; should they be split off?