Abstract
In this article, the partial molar volumes of hydrophobic compounds in water were reviewed. The partial molar volume of ethylbenzene in water was drawn as a function of pressure, 0.10-400 MPa, and temperature, 273-323 K. Negative compressibility of the partial molar volume was observed in a low temperature and low pressure region. It suggested that the hydration water was less compressibile than bulk water. Aromatic ring which was included in naphthalene, anthracene, etc. showed different volumetric properties from alkylbenzenes and methylene group. The difference was discussed in a stand point of hydrophobic hydration.
