Kelvin–Planck statement of the second law of thermodynamics

E247922

formulation of the second law of thermodynamics thermodynamic law statement

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.

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All labels observed (3)

Label	Occurrences
Kelvin–Planck statement of the second law of thermodynamics canonical	2
Kelvin–Planck formulation of the second law	1
Kelvin–Planck statement of the second law of thermodynamics under suitable assumptions	1

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 ⓘ

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Lord Kelvin → knownFor → Kelvin–Planck statement of the second law of thermodynamics ⓘ

Carathéodory’s formulation of the second law of thermodynamics → relatesTo → Kelvin–Planck statement of the second law of thermodynamics ⓘ

this entity surface form: Kelvin–Planck formulation of the second law

Clausius statement of the second law of thermodynamics → relatedTo → Kelvin–Planck statement of the second law of thermodynamics ⓘ

Clausius statement of the second law of thermodynamics → equivalentTo → Kelvin–Planck statement of the second law of thermodynamics ⓘ

this entity surface form: Kelvin–Planck statement of the second law of thermodynamics under suitable assumptions