The meaning of ENTROPY is a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder, that is a property of the system's state, and that varies directly with any reversibl
We discuss the meaning of gravitational entropy of the universe when quantum dissipative processes like cosmological particle production are important and ... BL Hu - 《Physics Letters A》 被引量: 52发表: 1982年 The Inhomogeneity and Entropy of the Universe: Some Puzzles With regard to the physi...
We discuss the meaning of gravitational entropy of the universe when quantum dissipative processes like cosmological particle production are important and propose to use the entropy generated in these processes as a measure of the change in gravitational entropy of the spacetime dynamics. Penrose's ...
The first records ofentropycome from around 1865. It comes from the Germanentropie, which combines the prefixen-, meaning “within or in,” and the combining form-trope, meaning “one turned toward.” Entropyis a measure of an increasingly complex situation that is happening within a system....
physical meaning of the second law in terms of the concept of disgregation, another word that he coined, a concept that never became part of the accepted structure of thermodynamics. [Martin J. Klein, "The Scientific Style of Josiah Willard Gibbs," in "A Century of Mathematics in America,...
Entropy, the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, entropy is also a measure of the molecular disorder, or randomness, of a system.
About 160 years ago, the concept of entropy was introduced in thermodynamics by Rudolf Clausius. Since then, it has been continually extended, interpreted, and applied by researchers in many scientific fields, such as general physics, information theory,
Entropy is the measure of the disorder of a system. It is anextensive propertyof a thermodynamic system, meaning its value changes depending on the amount of matter present. In equations, entropy is usually denoted by the letter S andhas unitsof joules per kelvin (J⋅K−1) or kg⋅m2...
The idea of entropy comes from a principle of thermodynamics dealing with energy. It usually refers to the idea that everything in the universe eventually moves from order to disorder, and entropy is the measurement of that change.
The physical meaning of entropy Entropy and "disorder" Entropy and probability Entropy, equilibrium, and time Absolute entropies Standard entropies of substances Entropy depends on concentration Summary of key concepts Concept map Entropy is one of the most fundamental concepts of physical science...