Physical Chemistry: Principles and Applications

This document is a detailed set of handwritten notes explaining the behavior of real gases using the Van der Waals equation and related concepts in thermodynamics. It begins with the limitations of the ideal gas model and introduces volume and pressure corrections to account for intermolecular forces and finite molecular size. The notes derive the Van der Waals equation and explain the physical significance of constants a and b, followed by discussions on its applicability under different conditions like low/high pressure and temperature. It further covers deviations of real gases, compressibility factor, and introduces the virial equation of state. The later sections focus on critical phenomena, including critical temperature, pressure, and volume, along with Andrews’ experiments and isotherm graphs (shown in diagrams on pages 13–14). Finally, the document explains relationships between critical constants and Van der Waals constants, methods to determine them experimentally, and graphical techniques for finding critical density and volume