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Volumetric properties of ethanol-water mixtures under high pressure
Aljana Petek, Darja Pečar, Valter Doleček, 2001, original scientific article

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
Published: 10.07.2015; Views: 746; Downloads: 50
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