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Title:Volumetric properties of ethanol-water mixtures under high pressure
Authors:Petek, Aljana (Author)
Pečar, Darja (Author)
Doleček, Valter (Author)
Files:.pdf Acta_Chimica_Slovenica_2001_Petek,_Pecar,_Dolecek_Volumetric_properties_of_ethanol-water_mixtures_under_high_pressure.pdf (424,02 KB)
MD5: 9BB1ECCC5B53C09AB9A2CD48A7E94F85
URL http://acta-arhiv.chem-soc.si/48/48-3-317.pdf
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Densities of ethanol-water mixtures have been measured using a vibrating tube densimeter and a different arrangement high-pressure experimental set-up. Measurements were carried out at 298,15 K in a pressure range from 0.1 MPa to 5MPa. Partial molar volumes, excess molar volumes and coefficients of isothermal compressibility were calculated. The molar volumes of alcohol and its partial molar volumes in mixtures with water are found to decrease monotonously with increasing pressure. Excess molar volumes are negative at all pressures. The numerical P-V relations at each composition are correlated satisfactorily as a function of pressure by the Hayward equation.
Keywords:chemistry, high-pressure vibrating tube densimeter, excess molar values, isothermal compressibility
Year of publishing:2001
Number of pages:str. 317-324
Numbering:št. 3, Letn. 48
ISSN on article:1318-0207
COBISS_ID:6504214 New window
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Record is a part of a journal

Title:Acta Chimica Slovenica
Shortened title:Acta Chim. Slov.
Publisher:Slovensko kemijsko društvo
COBISS.SI-ID:14086149 New window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:10.07.2015

Secondary language

Abstract:Gostote mešanic etanola z vodo smo izmerili z gostometrom, ki je bil prirejen za visokotlačne poskuse. Meritve so potekale pri 298,15 K v območju tlakov od 0,1 MPa do 5 MPa. Iz izmerjenih gostot smo izračunali parcialne molske prostornine, presežene molske prostornine in koeficiente izometrične stisljivosti. Molske prostornine etanola in njegove parcialne molske prostornine v mešanicah z vodo se monotono zmanjšujejo s povečanjem tlaka. Pri vseh tlakih so presežene molske prostornine negativne. Numerične P-V zveze v odvisnosti od tlaka so za vsako sestavo raztopine podane s Hayworthovo enačbo.
Keywords:kemija, gostotometer, visokotlačni poskusi, presežne molske vrednosti, izotermična stisljivost


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