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Thermodynamic properties of {xC2H5OH+(1−x)H2O} in the temperature range from 320 K to 420 K at pressures up to 200 MPa

✍ Scribed by Y. Takiguchi; O. Osada; M. Uematsu


Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
346 KB
Volume
28
Category
Article
ISSN
0021-9614

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✦ Synopsis


Measurements of (p, r, T ) at given temperatures and pressures in the compressed liquid phase for {xC2H5OH + (1x)H2O} with x = (0.1002, 0.2503, 0.4999, 0.7495, and 0.8904) were carried out with a metal-bellows variable volumometer along six isotherms between T = 320 K and T = 420 K at pressures from the bubble pressure to 200 MPa. The results cover the high-density region from r = 863 kg•m -3 to r = 1019 kg•m -3 for x = 0.1002, from r = 798 kg•m -3 to r = 976 kg•m -3 for x = 0.2503, from r = 727 kg•m -3 to r = 929 kg•m -3 for x = 0.4999, from r = 684 kg•m -3 to r = 899 kg•m -3 for x = 0.7495, and from r = 665 kg•m -3 to r = 885 kg•m -3 for x = 0.8904. The experimental uncertainties of temperature T, pressure p, density r, and mole fraction x were estimated to be 23 mK, 21.0•10 -3 •p, 21.0•10 -3 •r, and 26•10 -4 •x, respectively. Measurements of saturated liquid density and bubble pressure at temperatures from 320 K to 420 K are also reported. The bubble pressures indicate positive deviations from Raoult's law at all temperatures measured. The excess molar volumes indicate negative values in the temperature and pressure range of the present measurements and approach zero with increasing pressure.


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