@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t5-20.2>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "5-20.2" ;
  skosxl:prefLabel "internal energy"@en ;
  skosxl:altLabel "thermodynamic energy"@en ;
  skosxl:altLabel "U"@en ;
  skos:definition "energy of a system whose change is given by the amount of the heat (<<t5-6.1>>) transferred to the system and the work (<<iso80000-4>>) done on the system, provided that the system is closed and no chemical reactions occur"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-5> ;
  isq:hasUnit [
    skos:notation "J" ;
    skosxl:prefLabel "joule"@en
  ] ;
  isq:hasUnit [
    skos:notation "kg*m^2*s^(-2)" ;
    skosxl:prefLabel "kilogram square metre per second squared"@en
  ] ;
  skos:note "In thermodynamic text books, usually the formula\n\nstem:[Delta U = Q + W] is used. Note that the zero of the energy is undefined.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-5:ed-2:en:item:5-20.2> .