THE LAW OF SUPPLY AND DEMAND AS A MANIFESTATION OF THE SECOND LAW OF THERMODYNAMICS AND THE UNIFIED THERMODYNAMIC PHASE-SPACE FRAMEWORK

This treatise demonstrates that the classical law of supply and demand is not an autonomous axiom of economics but a surface‑level expression of the Second Law of Thermodynamics. Extending the thermodynamic state equation dE=TdS−PdV into a Unified Thermodynamic Phase‑Space Framework (UTPF), the analysis maps economic variables—price, quantity, volatility, institutional pressure, and market degrees of freedom—onto thermodynamic counterparts with structural rigor. The treatise shows that equilibrium price formation corresponds to entropy maximization, that market disequilibria reflect irreversible dissipative processes, and that economic crises exhibit the hallmarks of thermodynamic phase transitions. Four canonical market regimes are identified within the (T, V) phase‑space. Implications for policy, innovation, resilience, and institutional design are discussed.