TABLE OF CONTENTS Though chemical engineers normally deal with mixtures, pure component properties underlie much of the observed behavior. For example, property models intended for the whole range of composition must give pure component properties at the pure component limits. In addition, pure component property constants are often used as the basis for models such as corresponding states correlations for PVT equations of state (Chap. 4). They are often used in composition-dependent mixing rules for the parameters to describe mixtures (Chap. 5).
As a result, we first study methods for obtaining pure component constants of the more commonly used properties and show how they can be estimated if no experimental data are available. These include the vapor-liquid critical properties, atmospheric boiling and freezing temperatures and dipole moments. Others such as the liquid molar volume and heat capacities are discussed in later chapters. Values for these properties for many substances are tabulated in Appendix A; we compare as many of them as possible to the results from estimation methods. Though the origins of current group contribution methods are over 50 years old, previous editions show that the number of techniques were limited until recently when computational capability allowed more methods to appear. We examine most of the current techniques and refer readers to earlier editions for the older methods.
In Secs. 2-2 (critical properties), 2-3 (acentric factor) and 2-4 (melting and boiling points), we illustrate several methods and compare each with the data tabulated in Appendix A and with each...
