Effect of solvent on the partial molal volumes and heat capacities of nonelectrolytes期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Effect of solvent on the partial molal volumes and heat capacities of nonelectrolytes

Authors:	Raymond N. French Cecil M. Criss

Affiliation:	(1) Department of Chemistry, University of Miami, P. O. Box 249118, 33124 Coral Gables, Florida;(2) Present address: Chemical Engineering Department, Shell Development Company, Houston, Texas

Abstract:	Group contributions to in seven solvents and to $overline C _{p2}^o$ in three solvents have been tabulated. The variation of group parameters is discussed in terms of the solvent compressibility coefficient, _T. The scaled particle theory (SPT) is used to calculate cavity contributions to and C_p2^o. Interaction contributions are obtained from the cavity terms and and $overline C _{p2}^o$ values estimated through the additivity schemes. $overline C _{p2}^o$ values are more sensitive to solute-solvent interactions than in water and less sensitive in methanol. The SPT results for heat capacities support the concept of structural promotion by hydrophobic solutes in water.

Keywords:	Partial molal heat capacities partial molal volumes group additivity nonelectrolytes scaled particle theory hydrophobic hydration
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