135 We first describe the thermodynamic theory of surface tension and adsorption, by the method of the dividing surface of GIBBS. The use of a dividing surface or its equivalent is indispensable for the treatment of a curved interface, as otherwise the concepts of the area and curvature of the interface, cannot be pre cisely defined. In the case of a plane interface, however, the concept of the dividing surface is not necessary and a valid alternative exposition has been proposed by GUGGEN HEIM [3J, [4J in treating the interface zone as a separate entity of some definite thickness bounded by two mathematical planes. We make, however, little mention of this method, since it seems to be of only minor importance in connec tion with the statistical treatment of an interface. To avoid any ambiguity, the treatment of a spherical interface given in this article is based not on the original method of GIBBS but on the method modified by HILL [8J and KONDO [9]. This method, however, is not applicable to non spherical interfaces, which will not be dealt with in this article. Although all the relations for a plane interface can be deduced from the cor responding ones for a spherical interface by putting the curvature equal to zero, the planar and the spherical cases are considered separately because of the prac tical importance and easy physical visualization of a plane interface.

This volume describes the most recent findings on the structure of ILs interpreted through cutting-edge experimental and theoretical methods. Research in the field of ionic liquids (ILs) keeps a fast and steady pace. Since these new-generation molten salts first appeared in the chemistry and physics landscape, a large number of new compounds has been synthesized. Most of them display unexpected behaviour and possess stunning properties. The coverage in this book ranges from the mesoscopic structure of ILs to their interaction with proteins. The reader will learn how diffraction techniques (small and large angle X-Ray and neutron scattering, powder methods), X-Ray absorption spectroscopies (EXAFS/XANES), optical methods (IR, RAMAN), NMR and calorimetric methods can help the study of ILs, both as neat liquids and in mixtures with other compounds. It will enable the reader to choose the best method to suit their experimental needs. A detailed survey of theoretical methods, both quantum-chemical and classical, and of their predictive power will accompany the exposition of experimental ones. This book is a must read for postgraduate students, for post-docs, and for researchers who are interested in understanding the structural properties of ILs.

The statistical mechanical theory of liquids and solutions is a fundamental area of physical sciences with important implications for many industrial applications. This book shows how you can start from basic laws for the interactions and motions of microscopic particles and calculate how macroscopic systems of these particles behave, thereby explaining properties of matter at the scale that we perceive. Using this microscopic, molecular approach, the text emphasizes clarity of physical explanations for phenomena and mechanisms relevant to fluids, addressing the structure and behavior of liquids and solutions under various conditions. A notable feature is the author’s treatment of forces between particles that include nanoparticles, macroparticles, and surfaces. The book also provides an expanded, in-depth treatment of polar liquids and electrolytes.

Introductory remarks / R.L. Smith -- Free volume model of the liquid state / David Turnbull -- The geometry of the structure of liquids / J.D. Bernal -- A brief review of some aspects of the molecular theory of liquids / Stuart A. Rice -- Transport processes, correlation functions, and reciprocity relations in dense media / I. Prigogine -- An outline of the theory of transport properties / N.F. Mott -- X-ray and neutron diffraction studies of liquid structure / Newell S. Gingrich -- Inelastic neutron scattering by liquids / H. Palevsky -- Proton magnetic resonance studies of compounds with the structure (CH3)4X / George W. Smith -- Viscosity anomalies and other pre-freezing pheonomena / A.R. Ubbelohde -- Surface tension of liquid metals and oxide melts / Paul Kozakevitch -- Importance of the surface tension of metals in some engineering problems / D.J. Harvey -- Dynamic nucleation / Bruce Chalmers -- Eutectic solidification / G.A. Chadwick -- Deviation from the normal fusion curve / Donald L. Ball.