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<record version="4" id="112">
 <title>entropy</title>
 <name>Entropy</name>
 <created>2006-02-01 11:40:24</created>
 <modified>2006-02-02 23:25:38</modified>
 <type>Topic</type>
 <creator id="1" name="bloftin"/>
 <modifier id="21" name="pahio"/>
 <comment>Added: Clausius 1854 and the disorder interpretation.</comment>
 <author id="1" name="bloftin"/>
 <classification>
	<category scheme="msc" code="05.70.-a"/>
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 <content>\subsection{Introduction}

Entropy has a long and rich histroy in physics and was developed by many scientists over the years including Clausius, Maxwell, Boltzmann, Planck, Gibbs, Pauling and more recently Shannon and Hawking.  The applications of entropy are far and wide ranging from engines to black holes.

\subsection{Definition}

The classical definition of entropy relates the  differential change of entropy to the differential change in heat at a given temperature.

\begin{equation}
dS = \frac{dQ}{T}
\end{equation}




\subsection{Examples}



\emph{Entropy, this entry is world editable, so feel free to contribute.  Note please be curtious and document your changes with comments and discuss through posting.}

\subsection{References}

{\bf Beginner}

[1] Halliday, D., Resnick, R., Walker, J. "Fundamentals of Physics". 5th Edition, John Wiley \&amp; Sons, New York, 1997.

{\bf Intermediate}

[2] Kondepudi, D., Prigogine, I. "Modern Thermodynamics From Heat Engines to Dissipative Structures" John Wiley \&amp; Sons, Chichester, 1998.

[3] Kittel, C., Kroemer, H.  "Thermal Physics" Second Edition.  W.H. Freeman and Company, New York, 1980.

{\bf Advanced}

[4]  Greven, A., Keller, G., Warncke, G. "Entropy"  Princeton University Press, New Jersey, 2003.</content>
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