Darja Pečar (Author), Valter Doleček (Author)

Abstract

The densities of n-heptane, n-octane and their binary mixtures were measured at 298.15, 323.15 and 348.15 K and within the pressure range 0.1 to 40 MPa using a vibrating tube densimeter. The reliability of this technique has been verified in our previous works. The partial molar volumes, excess molar volumes, isothermal compressibilities, isobaric thermal expansivities and internal pressures were calculated from the obtained densities. This study presents the dependence of densities, partial molar volumes, excess molar volumes, isothermal compressibilities, isobaric thermal expansivities and internal pressures on composition, temperature and pressure.

Keywords

meritve gostote;parcialne molske prostornine;presežne molske prostornine;izotermična stisljivost;notranji tlak;n-heptan;n-oktan;density measurements;partial molar volume;excess molar volume;isothermal compressibility;isobaric thermal expansivity;internal pressure;n-heptane;n-octane;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: Slovensko kemijsko društvo
UDC: 541
COBISS: 11695894 Link will open in a new window
ISSN: 1318-0207
Views: 1063
Downloads: 90
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary abstract: S pomočjo gostotomera z nihajočo U-cevko smo izmerili gostote heptana, oktana in njunih binarnih mešanic pri 298,15, 323,15 in 348,15 K ter v območju tlakov od 0,1 do 40 MPa. Zanesljivost te tehnike je bila preverjena v naših prejšnjih delih. Iz dobljenih gostot smo izračunali parcialne molske prostornine, presežne molske prostornine, izotermne stisljivosti, prostorninski razteznostni koeficienti in notranji tlak. Nadalje smo predstavili, kako se gostote, parcialne molske prostornine, presežne molske prostornine, izotermna stisljivost, prostorninski razteznostni koeficient ter notranji tlak spreminjajo s sestavo, temperaturo in tlakom.
Secondary keywords: meritve gostote;parcialne molske prostornine;presežne molske prostornine;izotermična stisljivost;notranji tlak;n-heptan;n-oktan;
URN: URN:NBN:SI
Type (COBISS): Scientific work
Pages: str. 538-544
Volume: ǂVol. ǂ54
Issue: 3
Chronology: 2007
ID: 1738305