combined gas law
E480766
The combined gas law is a fundamental gas equation in physics and chemistry that relates pressure, volume, and temperature of a fixed amount of gas by merging Boyle’s, Charles’s, and Gay-Lussac’s laws into a single relationship.
All labels observed (1)
| Label | Occurrences |
|---|---|
| combined gas law canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4947669 — 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: combined gas law Context triple: [Boyle's law, combinedInto, combined gas law]
-
A.
ideal gas law
The ideal gas law is a fundamental equation in thermodynamics that relates the pressure, volume, temperature, and amount of an idealized gas, providing a simple model for gas behavior under many conditions.
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B.
Charles's law
Charles's law is a fundamental gas law stating that, at constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature.
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C.
Avogadro's law
Avogadro's law is a fundamental principle of chemistry stating that equal volumes of gases, at the same temperature and pressure, contain equal numbers of molecules.
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D.
Boyle's law
Boyle's law is a fundamental gas law in physics and chemistry stating that the pressure of a fixed amount of gas is inversely proportional to its volume at constant temperature.
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E.
Boyle
Boyle is a surname of Irish origin most famously associated with the 17th-century natural philosopher and chemist Robert Boyle, a pioneer of modern experimental science.
- 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: combined gas law Target entity description: The combined gas law is a fundamental gas equation in physics and chemistry that relates pressure, volume, and temperature of a fixed amount of gas by merging Boyle’s, Charles’s, and Gay-Lussac’s laws into a single relationship.
-
A.
ideal gas law
The ideal gas law is a fundamental equation in thermodynamics that relates the pressure, volume, temperature, and amount of an idealized gas, providing a simple model for gas behavior under many conditions.
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B.
Charles's law
Charles's law is a fundamental gas law stating that, at constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature.
-
C.
Avogadro's law
Avogadro's law is a fundamental principle of chemistry stating that equal volumes of gases, at the same temperature and pressure, contain equal numbers of molecules.
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D.
Boyle's law
Boyle's law is a fundamental gas law in physics and chemistry stating that the pressure of a fixed amount of gas is inversely proportional to its volume at constant temperature.
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E.
Boyle
Boyle is a surname of Irish origin most famously associated with the 17th-century natural philosopher and chemist Robert Boyle, a pioneer of modern experimental science.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
empirical law
ⓘ
gas law ⓘ physical law ⓘ |
| alsoKnownAs | general gas equation (for fixed n) ⓘ |
| appliesTo | ideal gas ⓘ |
| approximateValidity |
low pressure
ⓘ
moderate temperature ⓘ |
| assumes |
fixed amount of gas
ⓘ
gas molecules have negligible volume ⓘ negligible intermolecular forces ⓘ no phase change of gas ⓘ |
| breaksDownWhen |
very high pressure
ⓘ
very low temperature ⓘ |
| category | classical thermodynamics concept ⓘ |
| componentLaw |
Boyle's law
NERFINISHED
ⓘ
Charles's law NERFINISHED ⓘ Gay-Lussac's law NERFINISHED ⓘ |
| derivedFrom |
Boyle's law
NERFINISHED
ⓘ
Charles's law NERFINISHED ⓘ Gay-Lussac's law NERFINISHED ⓘ |
| dimension | relates intensive and extensive thermodynamic variables ⓘ |
| educationalLevel |
high school chemistry
ⓘ
introductory college physics ⓘ |
| expressesConservation | PV/T for a fixed amount of gas remains constant ⓘ |
| field |
chemistry
ⓘ
physics ⓘ |
| historicalContext | developed after individual gas laws were established ⓘ |
| implies |
if pressure is constant then V1 / T1 = V2 / T2
ⓘ
if temperature is constant then P1 V1 = P2 V2 ⓘ if volume is constant then P1 / T1 = P2 / T2 ⓘ |
| mathematicalRelation |
P is directly proportional to T at constant V
ⓘ
P is inversely proportional to V at constant T ⓘ V is directly proportional to T at constant P ⓘ |
| quantityHeldConstant | amount of substance (n) ⓘ |
| relatedTo | ideal gas law NERFINISHED ⓘ |
| relatesQuantity |
pressure
ⓘ
temperature ⓘ volume ⓘ |
| symbolicForm |
P V / T = constant
ⓘ
P1 V1 / T1 = P2 V2 / T2 ⓘ |
| temperatureUnitRequirement | Kelvin NERFINISHED ⓘ |
| usedFor |
introductory thermodynamics education
ⓘ
predicting final state of a gas ⓘ solving gas expansion problems ⓘ |
| usedIn |
engineering gas systems analysis
ⓘ
laboratory gas calculations ⓘ |
| usesTemperatureScale | absolute temperature ⓘ |
| validWhen | gas behaves ideally ⓘ |
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: combined gas law Description of subject: The combined gas law is a fundamental gas equation in physics and chemistry that relates pressure, volume, and temperature of a fixed amount of gas by merging Boyle’s, Charles’s, and Gay-Lussac’s laws into a single relationship.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.