The purpose of this book is to lay the groundwork for the analysis and the design of processes with a view to energetic efficiency. Energetics is used in the original sense of the engineer W. J. M. Rankine (Proc. Roy. Philosoph. Soc. of Glasgow III, 381 1955]) and the physical chemist J. N. Br3nsted (Principles and Problems in Energetics, Interscience, New York, 1955), i.e., the macroscopic description of the flows of different forms of energy, and the general laws governing the mutual transforma tions of these flows. The prerequisite for the use of the book is a conventional course in...