Effect of pressure on the solubilities ofo-,m- andp-xylene in water |
| |
Authors: | S. Sawamura K. Suzuki Y. Taniguchi |
| |
Affiliation: | (1) Department of Chemistry, Faculty of Science and Engineering, Ritsumeikan University, Kita-ku, 603 Kyoto, Japan |
| |
Abstract: | The solubilities of o-, m- and p-xylene in water were measured at 25.0°C up to 250, 385, and 50 MPa, respectively. The solubility increased with increasing pressure up to 120 MPa (50 MPa for p-xylene) and then decreased. The reaction volumes, Vo accompanying the dissolution at 0.1 MPa were estimated as –3.6±0.5, –3.4±0.5, and –4.1±0.5 cm3-mol–1 for o-, m-, and p-xylene, respectively, from the pressure dependences of the solubilities. The limiting partial molar volumes, of p- and o-xylene in water under high pressure were estimated from Vo and the molar volume of the xylene. The partial molar volumes decreased with increasing pressure. The reaction volume for the formation of intra-molecular pairwise hydrophobic interaction between the methyl groups, as proposed by Ben-Naim, is discussed for the Vo of p- and o-xylene at 0.1 MPa. |
| |
Keywords: | Solubility high pressure xylene hydrophobic interaction partial molar volume |
本文献已被 SpringerLink 等数据库收录! |
|