The chapter "The Properties of Gases and Liquids" from the book "The Properties of Gases and Liquids" by Robert C. Reid, John M. Prausnitz, and Bruce E. Poling covers a comprehensive range of topics related to the physical properties of gases and liquids. The chapter is divided into several sections, each focusing on different aspects of these properties: 1. **Estimation of Physical Properties**: This section discusses methods for estimating the properties of mixtures, including the pseudocritical method, second virial coefficients, and mixing rules for various equations of state. 2. **Thermodynamic Properties**: It covers fundamental thermodynamic principles, departure functions, heat capacities of real gases, and the true critical points of mixtures. 3. **Thermodynamic Properties of Ideal Gases**: This part explores estimation methods for ideal gases, including the Joback method, Yoneda method, and others, with a discussion on recommendations. 4. **Vapor Pressures and Enthalpies of Vaporization of Pure Fluids**: It delves into theories and correlations for vapor pressure, enthalpy of vaporization, and related properties such as enthalpy of fusion and sublimation. 5. **Fluid Phase Equilibria in Multicomponent Systems**: This section examines vapor-liquid equilibria, activity coefficients, and solubilities in multicomponent systems, including polymer solutions and aqueous electrolyte solutions. 6. **Viscosity**: It discusses the theory and estimation of viscosity for gases and liquids at various pressures and temperatures, including the effects of pressure and temperature on viscosity. 7. **Thermal Conductivity**: This part covers the theory and estimation of thermal conductivity for gases and liquids, including the effects of temperature and pressure. 8. **Diffusion Coefficients**: It explores diffusion in binary and multicomponent gas and liquid mixtures, including empirical correlations and concentration dependence. 9. **Surface Tension**: This section discusses the estimation and variation of surface tension for pure liquids and mixtures, including aqueous solutions. The chapter also includes appendices with property data banks and Lennard-Jones potentials determined from viscosity data.The chapter "The Properties of Gases and Liquids" from the book "The Properties of Gases and Liquids" by Robert C. Reid, John M. Prausnitz, and Bruce E. Poling covers a comprehensive range of topics related to the physical properties of gases and liquids. The chapter is divided into several sections, each focusing on different aspects of these properties: 1. **Estimation of Physical Properties**: This section discusses methods for estimating the properties of mixtures, including the pseudocritical method, second virial coefficients, and mixing rules for various equations of state. 2. **Thermodynamic Properties**: It covers fundamental thermodynamic principles, departure functions, heat capacities of real gases, and the true critical points of mixtures. 3. **Thermodynamic Properties of Ideal Gases**: This part explores estimation methods for ideal gases, including the Joback method, Yoneda method, and others, with a discussion on recommendations. 4. **Vapor Pressures and Enthalpies of Vaporization of Pure Fluids**: It delves into theories and correlations for vapor pressure, enthalpy of vaporization, and related properties such as enthalpy of fusion and sublimation. 5. **Fluid Phase Equilibria in Multicomponent Systems**: This section examines vapor-liquid equilibria, activity coefficients, and solubilities in multicomponent systems, including polymer solutions and aqueous electrolyte solutions. 6. **Viscosity**: It discusses the theory and estimation of viscosity for gases and liquids at various pressures and temperatures, including the effects of pressure and temperature on viscosity. 7. **Thermal Conductivity**: This part covers the theory and estimation of thermal conductivity for gases and liquids, including the effects of temperature and pressure. 8. **Diffusion Coefficients**: It explores diffusion in binary and multicomponent gas and liquid mixtures, including empirical correlations and concentration dependence. 9. **Surface Tension**: This section discusses the estimation and variation of surface tension for pure liquids and mixtures, including aqueous solutions. The chapter also includes appendices with property data banks and Lennard-Jones potentials determined from viscosity data.