(p,V,T,x) measurements for tetrahydrofuran and {xC4H8O + (1−x)H2O}

✍ Scribed by Phillip J. Back; Lawrence A. Woolf

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 176 KB
• Volume: 30
• Category: Article
• ISSN: 0021-9614
• DOI: 10.1006/jcht.1997.0310

✦ Synopsis

The effect of pressure on the volume of tetrahydrofuran THF has been measured as the ratio of the volume under pressure to its value at 0.1 MPa pressure with a bellows volumometer Ž . for temperatures from T s 278 to 323 K at pressures up to 300 MPa. Similar measurements Ž . Ž . have been made for two of its mixtures with water, x THF s 0.25 and 0.5 for temperatures Ž . from T s 288 to 338 K. The data have been fitted with two equations of state. Densities at atmospheric pressure have been measured for THF and for aqueous mixtures of THF. For Ž . Ž the latter the densities cover the composition range 0.2 F x F 0.8 at the temperatures 288, . 298, and 313 K and smaller ranges of composition at higher temperatures. Isothermal compressibilities, volume fluctuations, thermal expansivities, and the change in isobaric heat capacity from its value at 0.1 MPa pressure have been calculated. Significant features on these properties are discussed.