zeroth law of thermodynamics

E844097

law of thermodynamics physical law

The zeroth law of thermodynamics states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other, thereby defining the concept of temperature.

Jump to: Surface forms Statements Referenced by

Observed surface forms (1)

Surface form	Occurrences
Zeroth Law of Thermodynamics	1

Statements (43)

Predicate	Object
instanceOf	law of thermodynamics ⓘ physical law ⓘ
appliesTo	macroscopic systems ⓘ systems in thermodynamic equilibrium ⓘ
assumes	systems can be in thermal equilibrium ⓘ
basisFor	Celsius temperature scale NERFINISHED ⓘ Fahrenheit temperature scale NERFINISHED ⓘ Kelvin temperature scale NERFINISHED ⓘ thermodynamic temperature ⓘ
category	equilibrium principle ⓘ
concerns	heat exchange ⓘ thermal contact ⓘ
contrastsWith	non-equilibrium thermodynamics ⓘ
defines	temperature ⓘ thermal equilibrium ⓘ
enables	definition of empirical temperature scales ⓘ use of thermometers ⓘ
ensures	consistency of temperature comparisons ⓘ transitivity of temperature equality ⓘ
epistemicRole	axiom for defining temperature operationally ⓘ foundational postulate of classical thermodynamics ⓘ
field	statistical mechanics ⓘ thermodynamics ⓘ
historicalNote	formulated after the first and second laws of thermodynamics ⓘ named zeroth law to emphasize its logical precedence ⓘ
implies	existence of a scalar temperature function ⓘ systems at same temperature are in mutual thermal equilibrium ⓘ thermal equilibrium is a transitive relation ⓘ
mathematicalForm	equivalence relation on thermal equilibrium states ⓘ
precedes	first law of thermodynamics NERFINISHED ⓘ
relatedConcept	equation of state ⓘ ideal thermometer ⓘ temperature scale ⓘ thermodynamic equilibrium ⓘ thermodynamic system ⓘ
relatesTo	first law of thermodynamics NERFINISHED ⓘ second law of thermodynamics ⓘ third law of thermodynamics ⓘ
states	if two systems are each in thermal equilibrium with a third system, they are in thermal equilibrium with each other ⓘ
usedIn	calibration of thermometers ⓘ definition of intensive properties ⓘ temperature measurement ⓘ thermodynamic state postulates ⓘ

Referenced by (2)

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

“The four laws of black hole mechanics” → establishesAnalogyWith → zeroth law of thermodynamics ⓘ

subject surface form: The four laws of black hole mechanics

First Law of Thermodynamics → relatedTo → zeroth law of thermodynamics ⓘ

this entity surface form: Zeroth Law of Thermodynamics