@prefix isq: .
@prefix smart: .
@prefix rdf: .
@prefix dcterms: .
@prefix skos: .
a isq:Entry ;
rdf:type isq:Quantity ;
rdf:type smart:TermEntry ;
dcterms:identifier "5-1" ;
skosxl:prefLabel "thermodynamic temperature"@en ;
skosxl:altLabel "T"@en ;
skosxl:altLabel "Theta"@en ;
skos:definition "partial derivative of internal energy with respect to entropy at constant volume and constant number of particles in the system:\n\n[stem%unnumbered]\n++++\nT = ((del U)/(del S))_(V,N)\n++++\n\nwhere stem:[U] is internal energy (<>), stem:[S] is entropy (<>), stem:[V] is volume (<>), and stem:[N] is number of particles.\n"@en ;
smart:hasBindingnessType "bindingness-type:normative" ;
dcterms:isPartOf ;
isq:hasUnit [
skos:notation "K" ;
skosxl:prefLabel "kelvin"@en
] ;
skos:note "It is measured with a primary thermometer, examples of which are gas thermometers of different kinds, noise thermometers, or radiation thermometers.\n\nThe Boltzmann constant (<>) relates energy at the individual particle level with thermodynamic temperature.\n\nDifferences of thermodynamic temperatures or changes may be expressed either in kelvin, symbol stem:[\"unitsml(K)\"], or in de grees Celsius, symbol stem:[\"unitsml(degC)\"] (<>).\n\nThermodynamic temperature is one of the seven base quantities in the International System of Quantities, ISQ (see <>).\n\n*The International Temperature Scale of 1990*\n\nFor the purpose of practical measurements, the International Temperature Scale of 1990, ITS-90, was adopted by CIPM in 1989, which is a close approximation to the thermodynamic temperature scale.\n\nThe quantities defined by this scale are denoted stem:[T_\"90\"] and stem:[t_\"90\"], respectively (replacing stem:[T_\"68\"] and stem:[t_\"68\"] defined by the International Practical Temperature Scale of 1968, IPTS-68), where\n\n[stem%unnumbered]\n++++\n(t_\"90\")/(1 \"unitsml(degC)\") = (T_\"90\")/(1 \"unitsml(K)\") - 273.15\n++++\n\nThe units of stem:[T_\"90\"] and stem:[t_\"90\"] are the kelvin, symbol stem:[\"unitsml(K)\"], and the degree Celsius, symbol stem:[\"unitsml(degC)\"] (<>), respectively.\n\nFor further information, see <>, <>.\n\nFor ready conversion between temperatures reported on the International Temperature Scale and thermodynamic temperatures the systematic deviations can be found in <>.\n"@en ;
iso:urn .