An Account of Thermodynamic Entropy

An Account of Thermodynamic Entropy

The second law of thermodynamics is an example of the fundamental laws that govern our universe and is relevant to every branch of science exploring the physical world. This reference summarizes ...
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Pp. 149-151 (3)

DOI: 10.2174/9781681083933117010021

Author(s): Alberto Gianinetti


Entropy quantification can be performed under the assumption that both the position of a particle in space and its level of energy can be defined as corresponding to one among many enumerable states, even if their number is hugely high. This means that, if absolute values of entropy have to be computed, neither energy nor space should be continuous variables, even though entropy changes can be calculated in any case. Remarkably, quantum theory just says that’s the case, because at a very short scale both energy and space seem to behave like discrete quantities rather than as continuous ones. So, a general string theory, which represents the evolution of quantum theory, appears to be the natural, preferable theoretical framework for the definition of entropy.


Absolute entropy values, Continuous distributions, Classical approximation, Enumerability of microstates, Process directionality, Quantum mechanics, Reversible processes, String theory, Wasted work.