Textbook in PDF format This book aims to provide the university-level student and educator with a convenient means for testing depth of knowledge and developing problem-solving ability by enabling wide-ranging problems to be tackled without the support of a textbook framework. A solid foundation in physical chemistry concepts is fundamentally important for those wishing to make meaningful contributions to a diverse array of rapidly developing fields including renewable energy, environmental sustainability, biomedical technology, and material science and engineering. Effective solutions to real-world technological challenges require depth of knowledge and an ability to solve problems outside the usual contextual structure found in standard physical chemistry textbooks. Electronic Structures and Properties of Atoms and Simple Molecules Gas-state Molecular Kinetics and State Equations Thermodynamics Equilibrium in Solutions and Interfaces Units Important Formulae Frequently Used in Physical Chemistry Linear and Non-linear Least Squares Methods Useful Mathematical Expressions Electronic Structures and Properties of Atoms and Simple Molecules Gas-state Molecular Kinetics and State Equations Thermodynamics Equilibriums in Solution and Interface