This second edition presents an enriched and expanded exploration of the fundamental principles of thermodynamics tailored for graduate-level studies. Drawing on over three decades of academic teaching experience, the author has refined the content, making it more accessible and comprehensive. Chapter 1 has been restructured for clarity, delineating "e;Legendre Transformation"e; and "e;Thermodynamic Potentials"e; into separate sections, while the treatment of "e;Chemical Potentials"e; has been significantly augmented, encompassing two-component ideal gas mixtures and a re-derivation of chemical potentials for dilute solutions. Additionally, the section on thermodynamic stability now boasts enhanced explanations and illustrative figures. Chapter 2 introduces a groundbreaking section, "e;Electrolyte Solution in Electric Field as a Non-Uniform System,"e; providing fresh insights into unexplored realms. Chapter 3, now enriched with several new sections, delves into topics such as "e;Contact Angles on Heterogeneous Surfaces and Rough Surfaces,"e; "e;Elastic Liquid-Fluid Interface,"e; "e;Curvature Effect on Surface Tension,"e; "e;Solute Effect on Equilibrium Pressure,"e; and "e;Heterogeneous Bubble Nucleation in a Dilute Solution."e; Chapter 4 features new elucidations and discussions aimed at bolstering comprehension, while the entirely new Chapter 5 offers solutions to selected homework and exam questions, adding a practical dimension to the theoretical framework. This edition, encompassing approximately 50% new content, expands the book by 131 pages, rendering it an even more invaluable resource for professors instructing advanced thermodynamics and graduate students delving into this intricate subject matter.