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@article{195473,
        author = {DR. RAJESH KUMAR},
        title = {Thermodynamic Potentials and Their Applications in Physical Systems},
        journal = {International Journal of Innovative Research in Technology},
        year = {2026},
        volume = {12},
        number = {11},
        pages = {1494-1506},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=195473},
        abstract = {Few conceptual tools in physics have proven as broadly useful as thermodynamic potentials. These scalar state functions - internal energy (U), enthalpy (H), Helmholtz free energy (A), and Gibbs free energy (G) - encode the complete thermodynamic state of a system and, depending on which variables are held fixed, directly dictate whether a process will occur spontaneously, how far it will proceed, and what work can be extracted from it. Despite their 19th-century origins, thermodynamic potentials remain indispensable in contemporary research, from the computational design of alloys and pharmaceuticals to the statistical mechanics of quantum many-body systems and the thermodynamics of black holes.
This paper offers a thorough and cohesive treatment of all four potentials: their definitions, their interconnection through Legendre transformations, the Maxwell relations that emerge from their exact-differential nature, and their concrete applications across six major scientific domains. Throughout, the analysis is supported by quantitative graphical representations free energy curves, phase stability diagrams, reaction enthalpy comparisons, and application-domain distributions drawn from the literature up to 2024. The paper also addresses the extension of thermodynamic potential concepts to non-equilibrium and quantum settings, where classical definitions require careful re-examination, and concludes by identifying open research questions at the frontier of the field.},
        keywords = {Thermodynamic Potentials, Gibbs Free Energy, Helmholtz Free Energy, Enthalpy, Internal Energy, Maxwell Relations, Phase Transitions, Statistical Mechanics, Chemical Equilibrium.},
        month = {April},
        }