In thermodynamics, microthermodynamics is the study of micro-regions, of typically the behaviors of individual molecules attached to a surface, through interpretation of macroscopic thermodynamic properties in terms of molecular forces. [1]

Near-synonymous terms may include: nanothermodynamics, small systems thermodynamics, and molecular thermodynamics; although the former two seem to be exact synonyms; whereas molecular thermodynamics seems to most capture the meaning of what is meant by microthermodynamics.

In 1964, Louis de Broglie (1892-1987) is said to have introduced a version of “micro-thermodynamics”. [2] This assertion, however, needs, to be double checked.

In 1981, Turkish-born American chemical engineer Okkktay Sinanojlu (1935-), of the Lewis school and MIT school, introduced the most-cited version of microthermodynamics; introducing new quantities such as “microthermodynamic surface areas”, among others. [3]

1. Lee, Lloyd L. (1988). Molecular Thermodynamics of Nonideal Fluids (ch. v. Microthermodynamics, pgs. 95-). Buttersworth.
2. Sieniutycz, Stanislaw. (1992). “Thermal Momentum, Heat Inertia, and a Macroscopic Extension of de Broglie Microthermodynamics II. The Conservation Laws for Continued Equations with Sources.”, pgs. 408-); in: Extended Thermodynamics Systems. Taylor and Francis.
3. (a) Sinanoglu, Oktay. (1981). “A Microsurface Thermodynamics for Individual Molecules, Aggregates or Clusters.” Report.
(b) Sinanoglu, Oktay. (1981). “Microscopic Surface Tension Down to Molecular Dimensions and Microthermodynamic Surface Areas of Molecular Clusters” (abs). J. Chem. Phys. 75:463.
(c) Sinanoglu , Otkay and Nathanson, Giles. (1980). “Metric Geometry of Near- Equilibrium Irreversible Thermodynamics”. J. Chem. Phys. 72, 3127 (1980).
(d) Oktay Sinanoglu – Wikipedia.

Further reading
‚óŹ Rugh, Hans H. (2001). “Micro-thermodynamic Formalism” (abs), Phys. Rev. E. 64. 4-pgs.

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