Kelvin–Planck statement of the second law of thermodynamics
E247922
The Kelvin–Planck statement of the second law of thermodynamics asserts that it is impossible to construct a cyclic heat engine that converts all absorbed heat from a single reservoir entirely into work without any other effect.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T2244749 — 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.
Target entity: Kelvin–Planck statement of the second law of thermodynamics Context triple: [Lord Kelvin, knownFor, Kelvin–Planck statement of the second law of thermodynamics]
-
A.
Carathéodory’s formulation of the second law of thermodynamics
Carathéodory’s formulation of the second law of thermodynamics is a mathematically rigorous restatement of the second law based on the inaccessibility of certain thermodynamic states, providing a foundation for the concept of entropy without relying on cyclic processes or heat engines.
-
B.
third law of thermodynamics
The third law of thermodynamics is a fundamental principle stating that the entropy of a perfect crystal approaches zero as its temperature approaches absolute zero, forming a basis for absolute entropy measurements and low-temperature physics.
-
C.
Landauer's principle
Landauer's principle is a foundational concept in thermodynamics and information theory stating that erasing one bit of information in a computational process necessarily dissipates a minimum amount of heat, linking information processing to physical entropy.
-
D.
Kirchhoff's law of thermal radiation
Kirchhoff's law of thermal radiation is a fundamental principle in thermodynamics stating that, for a body in thermal equilibrium, its emissivity equals its absorptivity at each wavelength.
-
E.
Maxwell's demon thought experiment
Maxwell's demon thought experiment is a famous conceptual scenario in thermodynamics that imagines an intelligent being seemingly violating the second law by sorting fast and slow gas molecules without expending energy.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Kelvin–Planck statement of the second law of thermodynamics Target entity description: The Kelvin–Planck statement of the second law of thermodynamics asserts that it is impossible to construct a cyclic heat engine that converts all absorbed heat from a single reservoir entirely into work without any other effect.
-
A.
Carathéodory’s formulation of the second law of thermodynamics
Carathéodory’s formulation of the second law of thermodynamics is a mathematically rigorous restatement of the second law based on the inaccessibility of certain thermodynamic states, providing a foundation for the concept of entropy without relying on cyclic processes or heat engines.
-
B.
third law of thermodynamics
The third law of thermodynamics is a fundamental principle stating that the entropy of a perfect crystal approaches zero as its temperature approaches absolute zero, forming a basis for absolute entropy measurements and low-temperature physics.
-
C.
Landauer's principle
Landauer's principle is a foundational concept in thermodynamics and information theory stating that erasing one bit of information in a computational process necessarily dissipates a minimum amount of heat, linking information processing to physical entropy.
-
D.
Kirchhoff's law of thermal radiation
Kirchhoff's law of thermal radiation is a fundamental principle in thermodynamics stating that, for a body in thermal equilibrium, its emissivity equals its absorptivity at each wavelength.
-
E.
Maxwell's demon thought experiment
Maxwell's demon thought experiment is a famous conceptual scenario in thermodynamics that imagines an intelligent being seemingly violating the second law by sorting fast and slow gas molecules without expending energy.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
formulation of the second law of thermodynamics
ⓘ
thermodynamic law statement ⓘ |
| appliesTo |
cyclic heat engines
ⓘ
macroscopic thermodynamic systems ⓘ |
| assumes |
cyclic operation of the engine
ⓘ
existence of a thermal reservoir at constant temperature ⓘ |
| category | physical law ⓘ |
| clarifiedBy | statistical mechanics interpretation of entropy ⓘ |
| constrains | maximum efficiency of heat engines ⓘ |
| describes |
impossibility of perfect heat-to-work conversion in a cyclic engine
ⓘ
limitations of heat engine efficiency ⓘ |
| equivalentTo | Clausius statement of the second law of thermodynamics under suitable assumptions ⓘ |
| field |
statistical mechanics
ⓘ
thermodynamics ⓘ |
| forbids |
cyclic device that converts heat from a single reservoir completely into work
ⓘ
perpetual motion machine of the second kind ⓘ |
| hasConsequence |
heat engines must exchange heat with at least two reservoirs to produce work
ⓘ
no reversible engine can exceed the efficiency of a Carnot engine operating between the same two temperatures ⓘ |
| historicalPeriod | 19th century physics ⓘ |
| implies |
directionality of natural thermodynamic processes
ⓘ
existence of waste heat in real heat engines ⓘ impossibility of 100 percent efficient heat engines ⓘ |
| involvesConcept |
cyclic process
ⓘ
entropy ⓘ heat reservoir ⓘ thermal efficiency ⓘ work ⓘ |
| logicalForm | impossibility statement ⓘ |
| namedAfter |
Max Planck
ⓘ
Lord Kelvin ⓘ
surface form:
William Thomson, 1st Baron Kelvin
|
| partOf | second law of thermodynamics ⓘ |
| relatedTo |
Carnot cycle
ⓘ
surface form:
Carnot heat engine
Carnot efficiency ⓘ
surface form:
Carnot theorem
Clausius statement of the second law of thermodynamics ⓘ perpetual motion machine of the second kind ⓘ |
| states |
a cyclic heat engine must reject some heat to a lower-temperature reservoir if it produces work
ⓘ
no heat engine operating in a cycle can convert all the heat absorbed from a single reservoir into work ⓘ |
| supports | definition of thermodynamic temperature scale ⓘ |
| taughtIn |
graduate statistical physics courses
ⓘ
undergraduate thermodynamics courses ⓘ |
| usedIn |
design and analysis of power cycles
ⓘ
engineering thermodynamics ⓘ formulation of entropy increase principle ⓘ |
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.
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.
Subject: Kelvin–Planck statement of the second law of thermodynamics Description of subject: The Kelvin–Planck statement of the second law of thermodynamics asserts that it is impossible to construct a cyclic heat engine that converts all absorbed heat from a single reservoir entirely into work without any other effect.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.