The selection of the most adequate thermodynamic model in a process simulation is an issue that most process engineers have to face sooner or later. This book, conceived as a practical guide, aims at providing adequate answers by analyzing the questions to be looked at. The analysis (first chapter) yields three keys that are further discussed in three different chapters. (1) A good understanding of the properties required in the process, and their method of calculation is the first key. The second chapter provides the most important equations that are derived from the fundamental principles of thermodynamics. (2) An adequate description of the mixture, which is a combination of models and parameters, is the second key. The third chapter makes the link between components and models, both from a numerical (parameterization) and physical (molecular interactions) point of view. Finally, (3) a correct view of the phase behavior and trends in regard of the process conditions is the third key. The fourth chapter illustrates the phase behavior and makes model recommendations for the most significant industrial systems. In the last chapter, the key questions are reviewed for a number of typical processes. This book is intended for process engineers, as well as process engineering students who will find an original approach to thermodynamics, complementary of traditional lectures.Content:Front Matter Nomenclature Preface Table of Contents1. Introduction2. From Fundamentals to Properties3. From Components to Models4. From Phases to Method (Models) Selection5. Case StudiesIndex