Langmuir adsorption isotherm
E459377
The Langmuir adsorption isotherm is a model in surface chemistry that describes how molecules adsorb onto a solid surface to form a monolayer, assuming a fixed number of identical sites with no interactions between adsorbed molecules.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Langmuir adsorption isotherm canonical | 2 |
| Langmuir–Hinshelwood mechanism | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4655446 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Langmuir adsorption isotherm Context triple: [Irving Langmuir, knownFor, Langmuir adsorption isotherm]
-
A.
Butler–Volmer equation
The Butler–Volmer equation is a fundamental relation in electrochemistry that describes how the rate of an electrode reaction (current density) depends on the electrode potential and reaction kinetics.
-
B.
Clausius–Clapeyron relation
The Clausius–Clapeyron relation is a fundamental thermodynamic equation that describes how the pressure and temperature of a phase transition, such as boiling or condensation, are related.
-
C.
Cottrell equation
The Cottrell equation is a fundamental relation in electrochemistry that describes how current decays over time during a diffusion-controlled potential step at an electrode.
-
D.
Smoluchowski coagulation equation
The Smoluchowski coagulation equation is a fundamental integro-differential equation in statistical physics that models how particles undergoing random collisions aggregate over time into larger clusters.
-
E.
Child–Langmuir law
The Child–Langmuir law is a fundamental space-charge-limited current law in vacuum electronics that relates the current density between parallel electrodes to the applied voltage raised to the three-halves power.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Langmuir adsorption isotherm Target entity description: The Langmuir adsorption isotherm is a model in surface chemistry that describes how molecules adsorb onto a solid surface to form a monolayer, assuming a fixed number of identical sites with no interactions between adsorbed molecules.
-
A.
Butler–Volmer equation
The Butler–Volmer equation is a fundamental relation in electrochemistry that describes how the rate of an electrode reaction (current density) depends on the electrode potential and reaction kinetics.
-
B.
Clausius–Clapeyron relation
The Clausius–Clapeyron relation is a fundamental thermodynamic equation that describes how the pressure and temperature of a phase transition, such as boiling or condensation, are related.
-
C.
Cottrell equation
The Cottrell equation is a fundamental relation in electrochemistry that describes how current decays over time during a diffusion-controlled potential step at an electrode.
-
D.
Smoluchowski coagulation equation
The Smoluchowski coagulation equation is a fundamental integro-differential equation in statistical physics that models how particles undergoing random collisions aggregate over time into larger clusters.
-
E.
Child–Langmuir law
The Child–Langmuir law is a fundamental space-charge-limited current law in vacuum electronics that relates the current density between parallel electrodes to the applied voltage raised to the three-halves power.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
adsorption isotherm model
ⓘ
physicochemical model ⓘ surface chemistry concept ⓘ |
| appliesTo |
gas–solid adsorption
ⓘ
liquid–solid adsorption ⓘ |
| assumes |
dynamic equilibrium between adsorption and desorption
ⓘ
each site holds at most one adsorbate molecule ⓘ fixed number of adsorption sites ⓘ identical adsorption sites ⓘ localized adsorption at specific sites ⓘ monolayer coverage only ⓘ no interactions between adsorbed molecules ⓘ |
| describes |
adsorption of molecules on solid surfaces
ⓘ
formation of an adsorbed monolayer ⓘ |
| field |
chemical engineering
ⓘ
physical chemistry ⓘ surface chemistry ⓘ |
| generalizedBy |
BET adsorption isotherm
ⓘ
Freundlich adsorption isotherm ⓘ
linked to:
Freundlich
Temkin adsorption isotherm ⓘ |
| hasLimitation |
assumes homogeneous surface
ⓘ
does not account for adsorbate–adsorbate interactions ⓘ does not describe multilayer adsorption ⓘ less accurate at high surface coverage for real systems ⓘ |
| hasMathematicalForm |
θ = (K C) / (1 + K C)
ⓘ
θ = (K P) / (1 + K P) ⓘ |
| influencedBy |
nature of adsorbate
ⓘ
nature of adsorbent surface ⓘ temperature ⓘ |
| introducedBy | Irving Langmuir ⓘ |
| namedAfter | Irving Langmuir ⓘ |
| relatedConcept |
Langmuir–Hinshelwood mechanism
ⓘ
linked to:
Langmuir adsorption isotherm
adsorption equilibrium constant ⓘ surface coverage ⓘ |
| relates |
surface coverage to adsorbate concentration
ⓘ
surface coverage to adsorbate pressure ⓘ |
| usedIn |
activated carbon adsorption design
ⓘ
adsorption-based separation processes ⓘ biosorption studies ⓘ environmental engineering ⓘ heterogeneous catalysis ⓘ protein adsorption on surfaces ⓘ sensor surface functionalization analysis ⓘ surface reaction kinetics ⓘ |
| usesSymbol |
C for adsorbate concentration in solution
ⓘ
K for Langmuir adsorption equilibrium constant ⓘ P for adsorbate partial pressure ⓘ θ for fractional surface coverage ⓘ |
| yearProposed | 1916 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Langmuir adsorption isotherm Description of subject: The Langmuir adsorption isotherm is a model in surface chemistry that describes how molecules adsorb onto a solid surface to form a monolayer, assuming a fixed number of identical sites with no interactions between adsorbed molecules.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Langmuir adsorption isotherm