Configuration Entropy

In statistical mechanics, configuration entropy is the portion of a system's entropy that is related to the position of its constituent particles rather than to their velocity or momentum. It is physically related to the number of ways of arranging all the particles of the system while maintaining some overall set of specified system properties, such as energy. The configurational entropy is also known as microscopic entropy or conformational entropy in the study of macromolecules. In general, configurational entropy is the foundation of statistical thermodynamics.

It can be shown that the variation of configuration entropy of thermodynamic systems (e.g., ideal gas, and other systems with a vast number of internal degrees of freedom) in thermodynamic processes is equivalent to the variation of the macroscopic entropy defined as dS = δQ/T, where δQ is the heat exchanged between the system and the surrounding media, and T is temperature. Therefore configuration entropy is the same as macroscopic entropy.

Read more about Configuration EntropyCalculation

Other articles related to "configuration entropy, entropy, configurations":

Configuration Entropy - Calculation
... The configurational entropy is related to the number of possible configurations by Boltzmann's entropy formula where kB is the Boltzmann constant and W is ... can be in states n with probabilities Pn, the configurational entropy of the system is given by which in the perfect disorder limit (all Pn = 1/W ... This formulation is analogous to that of Shannon's information entropy ...
Index Of Physics Articles - C
... Condensed matter physics Conditional quantum entropy Conductance quantum Conduction band Conductive coupling Conductivity (electrolytic) Conductivity of transparency ... Cross-recurrence quantification Cross entropy Cross fluid Cross modulation Cross sea Cross section (physics) Crossing (physics) Crosswind Crow instability Crowbar (circuit) Crown glass ...
Nanomechanics
... of freedom in the object Importance of thermal fluctuations Importance of entropic effects (see configuration entropy) Importance of quantum effects (se ... Increased importance of thermal fluctuations and configuration entropy at the nanoscale give rise to superelasticity, entropic elasticity (entropic forces), and ... Aspects of configuration entropy are also of great interest in the context self-organization and cooperative behavior of open nanosystems ...

Famous quotes containing the word entropy:

    Just as the constant increase of entropy is the basic law of the universe, so it is the basic law of life to be ever more highly structured and to struggle against entropy.
    Václav Havel (b. 1936)