Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 42, Issue 8, Pages 1039-1049Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2010.03.022
Keywords
Ethanol; Density; Viscosity; Surface tension; Tait equation; VTF equation; IAPWS equation
Categories
Ask authors/readers for more resources
In this work, the results of density, viscosity, and surface tension measurements for ethanol are presented. Ethanol with stated mass fraction purity greater than 0.998 was further purified using molecular sieves. Density was measured within the temperature and pressure ranges, respectively, T = (278.15 to 353.15) K and p = (0.1 to 35) MPa by means of a vibrating tube densimeter, model DMA 512P from Anton Paar with an estimated uncertainty of +/- 0.5 kg . m(-3). The experimental (p, rho, T) results have been correlated by Tait equation. From this equation the isobaric expansivity, the isothermal compressibility, and the thermal pressure coefficient have been calculated. Viscosity was measured over the range T = (273.15 to 346.15) K using an Ubbelohde viscometer with a Schott-Gerate automatic measuring unit (Model AVS-470) with the associated uncertainty of +/- 0.001 mPa . s. The measured values were combined with selected values from the literature covering the range T = (223 K to 503) K, and the VTF model has been fitted to all the data. The surface tension of the liquid was measured using a tensiometer KSV Sigma 70 with a Du-Nouy ring for the range of T =(274.77 to 318.99) K with an uncertainty of +/- 0.01 mN . m(-1.) Using these data and critically assessed data of other authors compiled from the literature, a form of the IAPWS equation was used to correlate the surface tension within the temperature range 223 K up to the critical temperature. (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available