In science, will is a term referring to the mental faculties, operations, or surrounding circumstances connected to how one’s actions are chosen. [1]

Thermodynamics
In human thermodynamics, often is the case that when one begins to model human systems, comprised of human actions, as thermodynamic systems that the question of whether or not the “will” is free or not comes to the fore; an example English physicist C.G. Darwin’s 1952 thermodynamical view of humans as “human molecules”, but molecules with free will justified by a passing mention of their “unpredictability”. [2]

In 2002, American philosopher William Plank presented a nonequilibrium thermodynamics dissipative system model of German philosopher Friedrich Nietzsche’s 1883 theory of “will to power”; itself is a modified variant of German philosopher Arthur Schopenhauer’s 1818 theory of “will to live”. [3]

References
1. Will – Dictionary.com
2. Darwin, Charles G. (1952). The Next Million Years (pg. 26), (Scribd) (Google Books). London: Rupert Hart-Davis.
3. Plank, William. (2002). The Quantum Nietzsche: the Will to Power and the Nature of Dissipative Systems (ch. 7: Human Reality as a Thermodynamics Model, pgs. 33-34). iUniverse.

External links
● Will (philosophy) – Wikipedia.