book reviews Vfscoslty and Dilfuslvlty: A Predlctlve Treatment
Joel H. Hildebrand, University of California, Berkeley. John Wiley & Sons, New York, 1977. xiv 109 pages. Figures and tables. 15.5 X 23.5 em. $9.50.
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This momgraph rmsi-u; 13f thirtptn in. trrdrpendrnt papers un virchity, diffuswity, and solubility, all of which are authored by Joel Hildebrand during the period 1971-
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For those with particular interests in the area of transport properties, this collection of well-written oaDers would serve as an ideal reference i w r w 1,) current ideas, presented hy a scirnrist with a va.1 experience in thic suhject. The signifieient feature of this collection of papers is that they present a predictive treatment of transport properties using simple experimental concepts. There are no assumotions made about models such as
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are derived are basedonvery simple empirical relationships, hut they yield agreement with experiment t o three significant figures.
A420 1 Journal of Chemical Education
The widely used exponential equations, involving energies of activation for viscous flow or diffusivity have been abandoned in favor of simole direct d o t s of diffusivitv versus trrnperaturr or flulrlttv pciprocal of wsrosrtyl against liquid mold wlume. Man? pruhlems haw been anwered hy the \traight line approach showing agreement between fact and theory. A vast amount of experimental data have been used to formulate the various relationships. The papers are equally divided between viscosity and diffusion with one paper devoted to solubility. The most important general relationship which is constantly referred to is the variation of fluidity of a simple liquid with the degree of expansion over the v
