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เนื้อหาย่อ : In this sixth edition we have retained the basic objective of the earlier editions: * to present a comprehensive and rigorous treatment of classical thermodynamics while retaining an engineering perspective, and in doing so * to lay the groundwork for subsequent studies in such felds as fluid mechanics, heat transfer, and statistical thermodynamics, and also * to prepare the student to effectively use thermodynamics in the practice of engineering. We have deliberately directed our presentation to students: New concepts and defi- ons are presented in the context where they are first relevant in a natural progression. e first thermodynamic properties to be defined (Chapter 2) are those that can be readily asured: pressure, specifc volume, and temperature. In Chapter 3, tables of thermody- c properties are introduced, but only in regard to these measurable properties. Inter- energy and enthalpy are introduced in connection with the first law, entropy with the d law, and the Helmholtz and Gibbs functions in the chapter on thermodynamic re- . Many real world realistic examples have been included in the book to assist the t in gaining an understanding of thermodynamics, and the problems at the end of chapter have been carefully sequenced to correlate with the subject matter and are ped and identified as such. The early chapters in particular contain a much larger ber of examples, illustrations, and problems than in previous editions, and through- the book, chapter-end summaries are included, followed by a set of concept/study that should be of beneft to the students. NEW FEATURES IN THIS EDITION End-of-Chapter Summaries new end-of-chapter summaries provide a short review of the mein concepts covered chapter, with highlighted key words. To further enhance the summary we have the set of skills that the student should have mastered after studying t ills are among the outcomes that can be tested with the accompany y-guide problems in addition to the main set of homework problems.