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A constant-temperature relation between adsorbed amount or surface coverage and an explicitly defined bulk pressure, activity, or concentration.
wp-chem-solutionopenstax-chemistry-2eiupac-solubility-dataiupac-gold-bookEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Adsorption can be represented by an isotherm relating equilibrium uptake to bulk activity or pressure at fixed temperature; hysteresis, heterogeneity, reactions, transport, and metastability require qualification.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
wp-chem-solutionopenstax-chemistry-2eiupac-solubility-dataiupac-gold-bookEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
The Langmuir relation is one model realization of an adsorption isotherm and should not be inferred solely from a visually saturating curve.
The target is a model, idealization, restricted ansatz, approximation scheme, phenomenological fit, or historical representation used for the source system or theory. It need not have a universal small error parameter and is not thereby a controlled limit or effective theory. The edge label and detail must identify the precise status.
wp-chem-solutionopenstax-chemistry-2eiupac-solubility-dataiupac-gold-book