Results 1 to 10 of about 983,616 (223)
Entropy and entropy of mixing [PDF]
Entropy as a function of temperature at constant volume, S(T), can be determined by integrating the molar specific entropy capacity CV/T (CV: molar specific heat capacity at constant volume). As a second approach, S(T) at constant volume can be determined by differentiating the free energy with respect to the temperature, T. Recently, it has been shown
openaire +1 more source
Some of the next articles are maybe not open access.
2008
This article presents a scientific overview of ‘entropy’ as a thermodynamic basic function. A primary definition of entropy is stated in classical thermodynamics and statistical mechanics. The second law of thermodynamics states that, in any physical or chemical process, the quality of the energy in a system degrades, thus proving the existence of ...
MARCHETTINI, N.+3 more
openaire +5 more sources
This article presents a scientific overview of ‘entropy’ as a thermodynamic basic function. A primary definition of entropy is stated in classical thermodynamics and statistical mechanics. The second law of thermodynamics states that, in any physical or chemical process, the quality of the energy in a system degrades, thus proving the existence of ...
MARCHETTINI, N.+3 more
openaire +5 more sources
When is an Entropy an Entropy?
AIP Conference Proceedings, 2006I consider the conceptual arguments leading to the validity of the conventional physical approach to thermodynamics, as we know it. In spite of the familiarity we have with this approach, its internal logical structure deserves to be extracted. No new features are found, but some universal properties emerge. These are then applied to the unconventional
openaire +2 more sources
2000
Es handelt sich um eine extensive Zustandsgrose eines Systems im thermodynamischen Gleichgewicht, die eine zentrale Grose der Thermodynamik darstellt. Als Zustandsgrose besitzt S * ein vollstandiges Differential. Die Definition der Entropie erfolgt uber den zweiten Hauptsatz der Thermodynamik.
openaire +2 more sources
Es handelt sich um eine extensive Zustandsgrose eines Systems im thermodynamischen Gleichgewicht, die eine zentrale Grose der Thermodynamik darstellt. Als Zustandsgrose besitzt S * ein vollstandiges Differential. Die Definition der Entropie erfolgt uber den zweiten Hauptsatz der Thermodynamik.
openaire +2 more sources
Best Practice & Research Clinical Anaesthesiology, 2006
The concept of entropy, originally derived from thermodynamics, has been successfully applied to EEG analysis. Various entropy algorithms have been used in clinical studies, but until now a commercially available monitor exists only for spectral entropy.
openaire +3 more sources
The concept of entropy, originally derived from thermodynamics, has been successfully applied to EEG analysis. Various entropy algorithms have been used in clinical studies, but until now a commercially available monitor exists only for spectral entropy.
openaire +3 more sources
Entropy and Entropy Production
1973The limitations of a thermodynamic theory of a continuum by the atomic structure of matter are briefly discussed. They imply that any thermodynamic theory is of an approximate nature. Main emphasis is laid on the concept of a nonequilibrium entropy. It is shown that to an isothermal electrical network one can apply thermodynamic reasoning.
openaire +2 more sources
Entropy and the Entropy Principle
2019Clausius generalized the mathematical expression of Carnot’s principle obtained by Kelvin, and in 1865, introduced the concept of entropy and formulated the entropy principle. With the concept of entropy and the idea of the entropy principle, a definition of heat can be given, as well as mathematical formalism on equilibrium thermodynamics was ...
openaire +2 more sources