@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:t9-22>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "9-22" ;
  skosxl:prefLabel "activity factor"@en ;
  skosxl:altLabel "f_\"X\""@en ;
  skos:definition "for substance stem:[\"X\"] in a liquid or a solid mixture, quotient of absolute activity stem:[lambda_\"X\"] (<<t9-18>>) of substance stem:[\"X\"] and the product of absolute activity stem:[lambda_\"X\"^(**)] of the pure substance stem:[\"X\"] at the same temperature (<<iso80000-5>>) and pressure (<<iso80000-4>>) and amount-of-substance fraction stem:[x_\"X\"] of substance stem:[\"X\"] (<<t9-13>>):\n\n[stem%unnumbered]\n++++\nf_\"X\" = lambda_\"X\" // (lambda_\"X\"^(**) x_\"X\")\n++++\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-9> ;
  isq:hasUnit [
    skos:notation "1" ;
    skosxl:prefLabel "one"@en
  ] ;
  skos:note "The systematic name is \"activity factor\", but the name \"activity coefficient\" is also commonly used (see <<t9-25>>).\n\nActivity factors can also be obtained applying Raoult's law or Henry's law.\n"@en ;
  iso:urn <urn:iso:std:iso:80000:-9:ed-2:en:item:9-22> .