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This textbook covers the thermodynamics needed by chemical engineers both in their engineering and in their chemistry; it is intended for use in all undergraduate and some graduate-level courses. The authors emphasize a rigorous yet concise presentation of the fundamental chemical concepts governing the behavior of single and multicomponent mixtures, including phase and chemical equilibria. In the application of these concepts, consideration is given to the presentation of experimentally measured thermodynamic properties, and to their prediction for real fluids and their mixtures using methods founded on statistical mechanics. Several applications involving the transfer of heat and work that are of special importance to chemical engineers are studied in detail to show the use of thermodynamics in improving performance. The book is written in SI units and contains worked examples, exercises, and problems.

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F. A. Freeth provided the impetus for the research within the Alkali Division of Imperial Chemical Industries which led to the discovery of polyethylene by R. O. Gibson and E. W. Fawcett in March 1933. The importance of engineering in the development of the research equipment was recognized from the beginning by the appointment of Dr A. M. J. F. Michels as consultant on high-pressure techniques and apparatus, and by the later appointment of W. R. D. Manning as the research engineer in the team. They were, with others, responsible for the engineering development of the first chemical plant to operate continuously at pressures associated with those generated in large guns. The paper, which is based on one presented at the Golden Jubilee Conference ‘Polyethylenes 1933–1983’, * reviews the engineering developments of some of the more important components of polyethylene plants during the first fifty years. Commercial confidentiality and lack of space prohibits a discussion of some aspects of design.