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	<entry>
		<id>http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20317</id>
		<title>Lennard-Jones equation of state</title>
		<link rel="alternate" type="text/html" href="http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20317"/>
		<updated>2020-09-13T14:55:34Z</updated>

		<summary type="html">&lt;p&gt;95.90.228.132: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The [[equations of state |equation of state]] (EOS) of the [[Lennard-Jones model]]. Lennard-Jones EOS are widely used &amp;amp;ndash; especially in soft matter physics. Lennard-Jones EOS are also often used as a point of departure for the development of models of complex fluids. A large number of Lennard-Jones EOS have been developed in the past. Several popular Lennard-Jones EOS for the fluid phases were systematically compared and evaluated to simulation data &amp;lt;ref name=&amp;quot;Stephan&amp;quot;&amp;gt;[https://doi.org/10.1016/j.fluid.2020.112772  Simon Stephan, Jens Staubach, Hans Hasse &amp;quot;Review and comparison of equations of state for the Lennard-Jones fluid&amp;quot;, Fluid Phase Equilibria &#039;&#039;&#039;523&#039;&#039;&#039; pp. 112772 (2020)]&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;[https://doi.org/10.1007/s10765-020-02721-9  Simon Stephan, Ulrich K. Deiters &amp;quot;Characteristic Curves of the Lennard‑Jones Fluid&amp;quot; International Journal of Thermophysics &#039;&#039;&#039;41&#039;&#039;&#039; 147 pp. 112772 (2020)]&amp;lt;/ref&amp;gt;. The one of Kolafa and Nezbeda was therein found to be the most robust and accurate Lennard-Jones EOS. Ref. &amp;lt;ref name=&amp;quot;Stephan&amp;quot;&amp;gt;&amp;lt;/ref&amp;gt; gives a comprehensive review of EOS of the Lennard-Jones fluid. Overall, it was found that none of the presently available EOS gives a satisfactory description of the Lennard-Jones fluid, which makes the development of LJ EOS still an active field.&lt;br /&gt;
==Johnson, Zollweg and Gubbins==&lt;br /&gt;
Johnson, Zollweg and Gubbins &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1080/00268979300100411 J. Karl Johnson, John A. Zollweg and Keith E. Gubbins &amp;quot;The Lennard-Jones equation of state revisited&amp;quot;, Molecular Physics &#039;&#039;&#039;78&#039;&#039;&#039; pp. 591-618 (1993)]&amp;lt;/ref&amp;gt; proposed an equation of state based on 33 parameters within a modified [[Benedict, Webb and Rubin equation of state]], which accurately reproduces the [[Density-temperature | vapour-liquid equilibrium]] curve.&lt;br /&gt;
&lt;br /&gt;
==Kolafa and Nezbeda==&lt;br /&gt;
The Kolafa and Nezbeda equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1016/0378-3812(94)80001-4  Jirí Kolafa, Ivo Nezbeda &amp;quot;The Lennard-Jones fluid: an accurate analytic and theoretically-based equation of state&amp;quot;, Fluid Phase Equilibria &#039;&#039;&#039;100&#039;&#039;&#039; pp. 1-34 (1994)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
provides us with the [[Helmholtz energy function]]: (Eq. 30):&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;A=A_{\mathrm{HS}} + \exp (-\gamma \rho^2) \rho T \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} C_{ij} T^{i/2} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
the [[compressibility factor]] (Eq. 31)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;z \equiv \frac{P}{\rho T}= z_{\mathrm{HS}} +  \rho(1-2\gamma\rho^2) \exp (-\gamma \rho^2) \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} jC_{ij} T^{i/2-1} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
and the [[internal energy]] (Eq. 32)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;U=&lt;br /&gt;
 {3(z_{\rm HS}-1)\over d_{\rm hBH}}\,&lt;br /&gt;
 {\partial d_{\rm hBH}\over \partial (1/T)}&lt;br /&gt;
 + \rho \exp(-\gamma\rho^2)\,{\partial \Delta B_{\rm2,hBH}\over\partial (1/T)}&lt;br /&gt;
 - \sum_{ij} \left({i\over2}-1\right) C_{ij}\, T^{i/2} \rho^j&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
On the following page is the [[FORTRAN code for the Kolafa and Nezbeda equation of state]].&lt;br /&gt;
==Ree==&lt;br /&gt;
The Ree equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1063/1.439940 Francis H. Ree &amp;quot;Analytic representation of thermodynamic data for the Lennard‐Jones fluid&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;73&#039;&#039;&#039; pp. 5401-5403 (1980)]&amp;lt;/ref&amp;gt; is an extension of the earlier work of Hansen &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1103/PhysRevA.2.221 Jean-Pierre Hansen &amp;quot;Phase Transition of the Lennard-Jones System. II. High-Temperature Limit&amp;quot;, Physical Review A &#039;&#039;&#039;2&#039;&#039;&#039; pp. 221-230 (1970)]&amp;lt;/ref&amp;gt; in the high temperature region.&lt;br /&gt;
==Boltachev and Baidakov==&lt;br /&gt;
Boltachev and Baidakov have paid particular attention to including data from the metastable region &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1023/A:1023394122000 G. Sh. Boltachev and V. G. Baidakov &amp;quot;Equation of State for Lennard-Jones Fluid&amp;quot;, High Temperature &#039;&#039;&#039;41&#039;&#039;&#039; pp. 270-272 (2003)]&amp;lt;/ref&amp;gt;.&lt;br /&gt;
==Pieprzyk-Brańka-Maćkowiak and Heyes==&lt;br /&gt;
The Pieprzyk-Brańka-Maćkowiak and Heyes equation of state &amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5021560 S. Pieprzyk, A. C. Brańka, Sz. Maćkowiak and D. M. Heyes &amp;quot;Comprehensive representation of the Lennard-Jones equation of state based on molecular dynamics simulation data&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;148&#039;&#039;&#039; 114505 (2018)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
consists of a parameterisation of the  modified [[Benedict, Webb and Rubin equation of state]].&lt;br /&gt;
==PeTS==&lt;br /&gt;
The PeTS (perturbed truncated and shifted) equation of state for pure components &amp;lt;ref&amp;gt;[https://doi.org/10.1080/00268976.2018.1447153 Michaela Heier, Simon Stephan, Jinlu Liu, Walter G. Chapman, Hans Hasse and Kai Langenbach &amp;quot;Equation of state for the Lennard-Jones truncated and shifted fluid with a cut-off radius of 2.5σ based on perturbation theory and its applications to interfacial thermodynamics&amp;quot;, Molecular Physics &#039;&#039;&#039;116&#039;&#039;&#039; pp. 2083-2094 (2018)]&amp;lt;/ref&amp;gt; and mixtures &amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5093603 Simon Stephan, Kai Langenbach, Hans Hasse &amp;quot;interfacial properties of binary Lennard-Jones mixtures by molecular simulation and density gradient theory&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;150&#039;&#039;&#039; pp. 174704 (2019)]&amp;lt;/ref&amp;gt; (only for the Lennard-Jones truncated and shifted fluid).&lt;br /&gt;
==References==&lt;br /&gt;
&amp;lt;references/&amp;gt;&lt;br /&gt;
&#039;&#039;&#039;Related reading&#039;&#039;&#039;&lt;br /&gt;
*[http://dx.doi.org/10.1080/00268977900101051 J. J. Nicolas, K. E. Gubbins,  W. B. Streett and D. J. Tildesley &amp;quot;Equation of state for the Lennard-Jones fluid&amp;quot;, Molecular Physics &#039;&#039;&#039;37&#039;&#039;&#039; pp. 1429-1454 (1979)]&lt;br /&gt;
*[http://dx.doi.org/10.1016/0378-3812(93)87002-I   Karel Aim, Jirí Kolafa, Ivo Nezbeda and Horst L. Vörtler &amp;quot;The Lennard-Jones fluid revisited: new thermodynamic data and new equation of state&amp;quot;, Fluid Phase Equilibria  &#039;&#039;&#039;83&#039;&#039;&#039; pp. 15-22 (1993)]&lt;br /&gt;
*[http://dx.doi.org/10.1021/ie0495628 Hertanto Adidharma and Maciej Radosz &amp;quot;The LJ-Solid Equation of State Extended to Thermal Properties, Chain Molecules, and Mixtures&amp;quot;, Industrial and Engineering Chemistry Research &#039;&#039;&#039;43&#039;&#039;&#039; pp. 6890 - 6897 (2004)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.1823371     David M. Eike, Joan F. Brennecke, and Edward J. Maginn &amp;quot;Toward a robust and general molecular simulation method for computing solid-liquid coexistence&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;122&#039;&#039;&#039; 014115 (2005)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.3561698 Sergey A. Khrapak and Gregor E. Morfill &amp;quot;Accurate freezing and melting equations for the Lennard-Jones system&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;134&#039;&#039;&#039; 094108 (2011)]&lt;br /&gt;
*[https://doi.org/10.1063/1.4945000 Monika Thol, Gabor Rutkai, Andreas Köster, Rolf Lustig, Roland Span, and Jadran Vrabec &amp;quot;Equation of State for the Lennard-Jones Fluid&amp;quot;, Journal of Physical and Chemical Reference Data &#039;&#039;&#039;45&#039;&#039;&#039; 023101 (2016)]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{Numeric}}&lt;br /&gt;
[[category: equations of state]]&lt;/div&gt;</summary>
		<author><name>95.90.228.132</name></author>
	</entry>
	<entry>
		<id>http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20316</id>
		<title>Lennard-Jones equation of state</title>
		<link rel="alternate" type="text/html" href="http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20316"/>
		<updated>2020-09-13T14:27:36Z</updated>

		<summary type="html">&lt;p&gt;95.90.228.132: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The [[equations of state |equation of state]] of the [[Lennard-Jones model]].&lt;br /&gt;
==Johnson, Zollweg and Gubbins==&lt;br /&gt;
Johnson, Zollweg and Gubbins &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1080/00268979300100411 J. Karl Johnson, John A. Zollweg and Keith E. Gubbins &amp;quot;The Lennard-Jones equation of state revisited&amp;quot;, Molecular Physics &#039;&#039;&#039;78&#039;&#039;&#039; pp. 591-618 (1993)]&amp;lt;/ref&amp;gt; proposed an equation of state based on 33 parameters within a modified [[Benedict, Webb and Rubin equation of state]], which accurately reproduces the [[Density-temperature | vapour-liquid equilibrium]] curve.&lt;br /&gt;
&lt;br /&gt;
==Kolafa and Nezbeda==&lt;br /&gt;
The Kolafa and Nezbeda equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1016/0378-3812(94)80001-4  Jirí Kolafa, Ivo Nezbeda &amp;quot;The Lennard-Jones fluid: an accurate analytic and theoretically-based equation of state&amp;quot;, Fluid Phase Equilibria &#039;&#039;&#039;100&#039;&#039;&#039; pp. 1-34 (1994)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
provides us with the [[Helmholtz energy function]]: (Eq. 30):&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;A=A_{\mathrm{HS}} + \exp (-\gamma \rho^2) \rho T \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} C_{ij} T^{i/2} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
the [[compressibility factor]] (Eq. 31)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;z \equiv \frac{P}{\rho T}= z_{\mathrm{HS}} +  \rho(1-2\gamma\rho^2) \exp (-\gamma \rho^2) \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} jC_{ij} T^{i/2-1} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
and the [[internal energy]] (Eq. 32)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;U=&lt;br /&gt;
 {3(z_{\rm HS}-1)\over d_{\rm hBH}}\,&lt;br /&gt;
 {\partial d_{\rm hBH}\over \partial (1/T)}&lt;br /&gt;
 + \rho \exp(-\gamma\rho^2)\,{\partial \Delta B_{\rm2,hBH}\over\partial (1/T)}&lt;br /&gt;
 - \sum_{ij} \left({i\over2}-1\right) C_{ij}\, T^{i/2} \rho^j&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
On the following page is the [[FORTRAN code for the Kolafa and Nezbeda equation of state]].&lt;br /&gt;
==Ree==&lt;br /&gt;
The Ree equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1063/1.439940 Francis H. Ree &amp;quot;Analytic representation of thermodynamic data for the Lennard‐Jones fluid&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;73&#039;&#039;&#039; pp. 5401-5403 (1980)]&amp;lt;/ref&amp;gt; is an extension of the earlier work of Hansen &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1103/PhysRevA.2.221 Jean-Pierre Hansen &amp;quot;Phase Transition of the Lennard-Jones System. II. High-Temperature Limit&amp;quot;, Physical Review A &#039;&#039;&#039;2&#039;&#039;&#039; pp. 221-230 (1970)]&amp;lt;/ref&amp;gt; in the high temperature region.&lt;br /&gt;
==Boltachev and Baidakov==&lt;br /&gt;
Boltachev and Baidakov have paid particular attention to including data from the metastable region &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1023/A:1023394122000 G. Sh. Boltachev and V. G. Baidakov &amp;quot;Equation of State for Lennard-Jones Fluid&amp;quot;, High Temperature &#039;&#039;&#039;41&#039;&#039;&#039; pp. 270-272 (2003)]&amp;lt;/ref&amp;gt;.&lt;br /&gt;
==Pieprzyk-Brańka-Maćkowiak and Heyes==&lt;br /&gt;
The Pieprzyk-Brańka-Maćkowiak and Heyes equation of state &amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5021560 S. Pieprzyk, A. C. Brańka, Sz. Maćkowiak and D. M. Heyes &amp;quot;Comprehensive representation of the Lennard-Jones equation of state based on molecular dynamics simulation data&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;148&#039;&#039;&#039; 114505 (2018)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
consists of a parameterisation of the  modified [[Benedict, Webb and Rubin equation of state]].&lt;br /&gt;
==PeTS==&lt;br /&gt;
The PeTS (perturbed truncated and shifted) equation of state for pure components &amp;lt;ref&amp;gt;[https://doi.org/10.1080/00268976.2018.1447153 Michaela Heier, Simon Stephan, Jinlu Liu, Walter G. Chapman, Hans Hasse and Kai Langenbach &amp;quot;Equation of state for the Lennard-Jones truncated and shifted fluid with a cut-off radius of 2.5σ based on perturbation theory and its applications to interfacial thermodynamics&amp;quot;, Molecular Physics &#039;&#039;&#039;116&#039;&#039;&#039; pp. 2083-2094 (2018)]&amp;lt;/ref&amp;gt; and mixtures &amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5093603 Simon Stephan, Kai Langenbach, Hans Hasse &amp;quot;interfacial properties of binary Lennard-Jones mixtures by molecular simulation and density gradient theory&amp;quot;, Journal of Chemical Physics&#039;&#039;&#039;150&#039;&#039;&#039; pp. 174704 (2019)]&amp;lt;/ref&amp;gt; (only for the Lennard-Jones truncated and shifted fluid).&lt;br /&gt;
==References==&lt;br /&gt;
&amp;lt;references/&amp;gt;&lt;br /&gt;
&#039;&#039;&#039;Related reading&#039;&#039;&#039;&lt;br /&gt;
*[http://dx.doi.org/10.1080/00268977900101051 J. J. Nicolas, K. E. Gubbins,  W. B. Streett and D. J. Tildesley &amp;quot;Equation of state for the Lennard-Jones fluid&amp;quot;, Molecular Physics &#039;&#039;&#039;37&#039;&#039;&#039; pp. 1429-1454 (1979)]&lt;br /&gt;
*[http://dx.doi.org/10.1016/0378-3812(93)87002-I   Karel Aim, Jirí Kolafa, Ivo Nezbeda and Horst L. Vörtler &amp;quot;The Lennard-Jones fluid revisited: new thermodynamic data and new equation of state&amp;quot;, Fluid Phase Equilibria  &#039;&#039;&#039;83&#039;&#039;&#039; pp. 15-22 (1993)]&lt;br /&gt;
*[http://dx.doi.org/10.1021/ie0495628 Hertanto Adidharma and Maciej Radosz &amp;quot;The LJ-Solid Equation of State Extended to Thermal Properties, Chain Molecules, and Mixtures&amp;quot;, Industrial and Engineering Chemistry Research &#039;&#039;&#039;43&#039;&#039;&#039; pp. 6890 - 6897 (2004)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.1823371     David M. Eike, Joan F. Brennecke, and Edward J. Maginn &amp;quot;Toward a robust and general molecular simulation method for computing solid-liquid coexistence&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;122&#039;&#039;&#039; 014115 (2005)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.3561698 Sergey A. Khrapak and Gregor E. Morfill &amp;quot;Accurate freezing and melting equations for the Lennard-Jones system&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;134&#039;&#039;&#039; 094108 (2011)]&lt;br /&gt;
*[https://doi.org/10.1063/1.4945000 Monika Thol, Gabor Rutkai, Andreas Köster, Rolf Lustig, Roland Span, and Jadran Vrabec &amp;quot;Equation of State for the Lennard-Jones Fluid&amp;quot;, Journal of Physical and Chemical Reference Data &#039;&#039;&#039;45&#039;&#039;&#039; 023101 (2016)]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{Numeric}}&lt;br /&gt;
[[category: equations of state]]&lt;/div&gt;</summary>
		<author><name>95.90.228.132</name></author>
	</entry>
	<entry>
		<id>http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20315</id>
		<title>Lennard-Jones equation of state</title>
		<link rel="alternate" type="text/html" href="http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20315"/>
		<updated>2020-09-13T14:24:15Z</updated>

		<summary type="html">&lt;p&gt;95.90.228.132: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The [[equations of state |equation of state]] of the [[Lennard-Jones model]].&lt;br /&gt;
==Johnson, Zollweg and Gubbins==&lt;br /&gt;
Johnson, Zollweg and Gubbins &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1080/00268979300100411 J. Karl Johnson, John A. Zollweg and Keith E. Gubbins &amp;quot;The Lennard-Jones equation of state revisited&amp;quot;, Molecular Physics &#039;&#039;&#039;78&#039;&#039;&#039; pp. 591-618 (1993)]&amp;lt;/ref&amp;gt; proposed an equation of state based on 33 parameters within a modified [[Benedict, Webb and Rubin equation of state]], which accurately reproduces the [[Density-temperature | vapour-liquid equilibrium]] curve.&lt;br /&gt;
&lt;br /&gt;
==Kolafa and Nezbeda==&lt;br /&gt;
The Kolafa and Nezbeda equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1016/0378-3812(94)80001-4  Jirí Kolafa, Ivo Nezbeda &amp;quot;The Lennard-Jones fluid: an accurate analytic and theoretically-based equation of state&amp;quot;, Fluid Phase Equilibria &#039;&#039;&#039;100&#039;&#039;&#039; pp. 1-34 (1994)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
provides us with the [[Helmholtz energy function]]: (Eq. 30):&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;A=A_{\mathrm{HS}} + \exp (-\gamma \rho^2) \rho T \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} C_{ij} T^{i/2} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
the [[compressibility factor]] (Eq. 31)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;z \equiv \frac{P}{\rho T}= z_{\mathrm{HS}} +  \rho(1-2\gamma\rho^2) \exp (-\gamma \rho^2) \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} jC_{ij} T^{i/2-1} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
and the [[internal energy]] (Eq. 32)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;U=&lt;br /&gt;
 {3(z_{\rm HS}-1)\over d_{\rm hBH}}\,&lt;br /&gt;
 {\partial d_{\rm hBH}\over \partial (1/T)}&lt;br /&gt;
 + \rho \exp(-\gamma\rho^2)\,{\partial \Delta B_{\rm2,hBH}\over\partial (1/T)}&lt;br /&gt;
 - \sum_{ij} \left({i\over2}-1\right) C_{ij}\, T^{i/2} \rho^j&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
On the following page is the [[FORTRAN code for the Kolafa and Nezbeda equation of state]].&lt;br /&gt;
==Ree==&lt;br /&gt;
The Ree equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1063/1.439940 Francis H. Ree &amp;quot;Analytic representation of thermodynamic data for the Lennard‐Jones fluid&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;73&#039;&#039;&#039; pp. 5401-5403 (1980)]&amp;lt;/ref&amp;gt; is an extension of the earlier work of Hansen &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1103/PhysRevA.2.221 Jean-Pierre Hansen &amp;quot;Phase Transition of the Lennard-Jones System. II. High-Temperature Limit&amp;quot;, Physical Review A &#039;&#039;&#039;2&#039;&#039;&#039; pp. 221-230 (1970)]&amp;lt;/ref&amp;gt; in the high temperature region.&lt;br /&gt;
==Boltachev and Baidakov==&lt;br /&gt;
Boltachev and Baidakov have paid particular attention to including data from the metastable region &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1023/A:1023394122000 G. Sh. Boltachev and V. G. Baidakov &amp;quot;Equation of State for Lennard-Jones Fluid&amp;quot;, High Temperature &#039;&#039;&#039;41&#039;&#039;&#039; pp. 270-272 (2003)]&amp;lt;/ref&amp;gt;.&lt;br /&gt;
==Pieprzyk-Brańka-Maćkowiak and Heyes==&lt;br /&gt;
The Pieprzyk-Brańka-Maćkowiak and Heyes equation of state &amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5021560 S. Pieprzyk, A. C. Brańka, Sz. Maćkowiak and D. M. Heyes &amp;quot;Comprehensive representation of the Lennard-Jones equation of state based on molecular dynamics simulation data&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;148&#039;&#039;&#039; 114505 (2018)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
consists of a parameterisation of the  modified [[Benedict, Webb and Rubin equation of state]].&lt;br /&gt;
==PeTS==&lt;br /&gt;
The PeTS (perturbed truncated and shifted) equation of state &amp;lt;ref&amp;gt;[https://doi.org/10.1080/00268976.2018.1447153 Michaela Heier, Simon Stephan, Jinlu Liu, Walter G. Chapman, Hans Hasse and Kai Langenbach &amp;quot;Equation of state for the Lennard-Jones truncated and shifted fluid with a cut-off radius of 2.5σ based on perturbation theory and its applications to interfacial thermodynamics&amp;quot;, Molecular Physics &#039;&#039;&#039;116&#039;&#039;&#039; pp. 2083-2094 (2018)]&amp;lt;/ref&amp;gt; .&lt;br /&gt;
&amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5093603 Simon Stephan, Kai Langenbach, Hans Hasse &amp;quot;nterfacial properties of binary Lennard-Jones mixtures by molecular simulation and density gradient theory&amp;quot;, Journal of Chemical Physics&#039;&#039;&#039;150&#039;&#039;&#039; pp. 174704 (2019)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
==References==&lt;br /&gt;
&amp;lt;references/&amp;gt;&lt;br /&gt;
&#039;&#039;&#039;Related reading&#039;&#039;&#039;&lt;br /&gt;
*[http://dx.doi.org/10.1080/00268977900101051 J. J. Nicolas, K. E. Gubbins,  W. B. Streett and D. J. Tildesley &amp;quot;Equation of state for the Lennard-Jones fluid&amp;quot;, Molecular Physics &#039;&#039;&#039;37&#039;&#039;&#039; pp. 1429-1454 (1979)]&lt;br /&gt;
*[http://dx.doi.org/10.1016/0378-3812(93)87002-I   Karel Aim, Jirí Kolafa, Ivo Nezbeda and Horst L. Vörtler &amp;quot;The Lennard-Jones fluid revisited: new thermodynamic data and new equation of state&amp;quot;, Fluid Phase Equilibria  &#039;&#039;&#039;83&#039;&#039;&#039; pp. 15-22 (1993)]&lt;br /&gt;
*[http://dx.doi.org/10.1021/ie0495628 Hertanto Adidharma and Maciej Radosz &amp;quot;The LJ-Solid Equation of State Extended to Thermal Properties, Chain Molecules, and Mixtures&amp;quot;, Industrial and Engineering Chemistry Research &#039;&#039;&#039;43&#039;&#039;&#039; pp. 6890 - 6897 (2004)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.1823371     David M. Eike, Joan F. Brennecke, and Edward J. Maginn &amp;quot;Toward a robust and general molecular simulation method for computing solid-liquid coexistence&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;122&#039;&#039;&#039; 014115 (2005)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.3561698 Sergey A. Khrapak and Gregor E. Morfill &amp;quot;Accurate freezing and melting equations for the Lennard-Jones system&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;134&#039;&#039;&#039; 094108 (2011)]&lt;br /&gt;
*[https://doi.org/10.1063/1.4945000 Monika Thol, Gabor Rutkai, Andreas Köster, Rolf Lustig, Roland Span, and Jadran Vrabec &amp;quot;Equation of State for the Lennard-Jones Fluid&amp;quot;, Journal of Physical and Chemical Reference Data &#039;&#039;&#039;45&#039;&#039;&#039; 023101 (2016)]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{Numeric}}&lt;br /&gt;
[[category: equations of state]]&lt;/div&gt;</summary>
		<author><name>95.90.228.132</name></author>
	</entry>
	<entry>
		<id>http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20314</id>
		<title>Lennard-Jones equation of state</title>
		<link rel="alternate" type="text/html" href="http://www.sklogwiki.org/SklogWiki/index.php?title=Lennard-Jones_equation_of_state&amp;diff=20314"/>
		<updated>2020-09-13T14:23:32Z</updated>

		<summary type="html">&lt;p&gt;95.90.228.132: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The [[equations of state |equation of state]] of the [[Lennard-Jones model]].&lt;br /&gt;
==Johnson, Zollweg and Gubbins==&lt;br /&gt;
Johnson, Zollweg and Gubbins &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1080/00268979300100411 J. Karl Johnson, John A. Zollweg and Keith E. Gubbins &amp;quot;The Lennard-Jones equation of state revisited&amp;quot;, Molecular Physics &#039;&#039;&#039;78&#039;&#039;&#039; pp. 591-618 (1993)]&amp;lt;/ref&amp;gt; proposed an equation of state based on 33 parameters within a modified [[Benedict, Webb and Rubin equation of state]], which accurately reproduces the [[Density-temperature | vapour-liquid equilibrium]] curve.&lt;br /&gt;
&lt;br /&gt;
==Kolafa and Nezbeda==&lt;br /&gt;
The Kolafa and Nezbeda equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1016/0378-3812(94)80001-4  Jirí Kolafa, Ivo Nezbeda &amp;quot;The Lennard-Jones fluid: an accurate analytic and theoretically-based equation of state&amp;quot;, Fluid Phase Equilibria &#039;&#039;&#039;100&#039;&#039;&#039; pp. 1-34 (1994)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
provides us with the [[Helmholtz energy function]]: (Eq. 30):&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;A=A_{\mathrm{HS}} + \exp (-\gamma \rho^2) \rho T \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} C_{ij} T^{i/2} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
the [[compressibility factor]] (Eq. 31)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;z \equiv \frac{P}{\rho T}= z_{\mathrm{HS}} +  \rho(1-2\gamma\rho^2) \exp (-\gamma \rho^2) \Delta B_{2,{\mathrm{hBH}}} + \sum_{ij} jC_{ij} T^{i/2-1} \rho^j&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
and the [[internal energy]] (Eq. 32)&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;U=&lt;br /&gt;
 {3(z_{\rm HS}-1)\over d_{\rm hBH}}\,&lt;br /&gt;
 {\partial d_{\rm hBH}\over \partial (1/T)}&lt;br /&gt;
 + \rho \exp(-\gamma\rho^2)\,{\partial \Delta B_{\rm2,hBH}\over\partial (1/T)}&lt;br /&gt;
 - \sum_{ij} \left({i\over2}-1\right) C_{ij}\, T^{i/2} \rho^j&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
On the following page is the [[FORTRAN code for the Kolafa and Nezbeda equation of state]].&lt;br /&gt;
==Ree==&lt;br /&gt;
The Ree equation of state &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1063/1.439940 Francis H. Ree &amp;quot;Analytic representation of thermodynamic data for the Lennard‐Jones fluid&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;73&#039;&#039;&#039; pp. 5401-5403 (1980)]&amp;lt;/ref&amp;gt; is an extension of the earlier work of Hansen &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1103/PhysRevA.2.221 Jean-Pierre Hansen &amp;quot;Phase Transition of the Lennard-Jones System. II. High-Temperature Limit&amp;quot;, Physical Review A &#039;&#039;&#039;2&#039;&#039;&#039; pp. 221-230 (1970)]&amp;lt;/ref&amp;gt; in the high temperature region.&lt;br /&gt;
==Boltachev and Baidakov==&lt;br /&gt;
Boltachev and Baidakov have paid particular attention to including data from the metastable region &amp;lt;ref&amp;gt;[http://dx.doi.org/10.1023/A:1023394122000 G. Sh. Boltachev and V. G. Baidakov &amp;quot;Equation of State for Lennard-Jones Fluid&amp;quot;, High Temperature &#039;&#039;&#039;41&#039;&#039;&#039; pp. 270-272 (2003)]&amp;lt;/ref&amp;gt;.&lt;br /&gt;
==Pieprzyk-Brańka-Maćkowiak and Heyes==&lt;br /&gt;
The Pieprzyk-Brańka-Maćkowiak and Heyes equation of state &amp;lt;ref&amp;gt;[https://doi.org/10.1063/1.5021560 S. Pieprzyk, A. C. Brańka, Sz. Maćkowiak and D. M. Heyes &amp;quot;Comprehensive representation of the Lennard-Jones equation of state based on molecular dynamics simulation data&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;148&#039;&#039;&#039; 114505 (2018)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
consists of a parameterisation of the  modified [[Benedict, Webb and Rubin equation of state]].&lt;br /&gt;
==PeTS==&lt;br /&gt;
The PeTS (perturbed truncated and shifted) equation of state &amp;lt;ref&amp;gt;[https://doi.org/10.1080/00268976.2018.1447153 Michaela Heier, Simon Stephan, Jinlu Liu, Walter G. Chapman, Hans Hasse and Kai Langenbach &amp;quot;Equation of state for the Lennard-Jones truncated and shifted fluid with a cut-off radius of 2.5σ based on perturbation theory and its applications to interfacial thermodynamics&amp;quot;, Molecular Physics &#039;&#039;&#039;116&#039;&#039;&#039; pp. 2083-2094 (2018)]&amp;lt;/ref&amp;gt; .&lt;br /&gt;
&amp;lt;ref&amp;gt;[https://doi.org/10.1080/00268976.2018.1447153 Simon Stephan, Kai Langenbach, Hans Hasse &amp;quot;nterfacial properties of binary Lennard-Jones mixtures by molecular simulation and density gradient theory&amp;quot;, Journal of Chemical Physics&#039;&#039;&#039;150&#039;&#039;&#039; pp. 174704 (2019)]&amp;lt;/ref&amp;gt;&lt;br /&gt;
==References==&lt;br /&gt;
&amp;lt;references/&amp;gt;&lt;br /&gt;
&#039;&#039;&#039;Related reading&#039;&#039;&#039;&lt;br /&gt;
*[http://dx.doi.org/10.1080/00268977900101051 J. J. Nicolas, K. E. Gubbins,  W. B. Streett and D. J. Tildesley &amp;quot;Equation of state for the Lennard-Jones fluid&amp;quot;, Molecular Physics &#039;&#039;&#039;37&#039;&#039;&#039; pp. 1429-1454 (1979)]&lt;br /&gt;
*[http://dx.doi.org/10.1016/0378-3812(93)87002-I   Karel Aim, Jirí Kolafa, Ivo Nezbeda and Horst L. Vörtler &amp;quot;The Lennard-Jones fluid revisited: new thermodynamic data and new equation of state&amp;quot;, Fluid Phase Equilibria  &#039;&#039;&#039;83&#039;&#039;&#039; pp. 15-22 (1993)]&lt;br /&gt;
*[http://dx.doi.org/10.1021/ie0495628 Hertanto Adidharma and Maciej Radosz &amp;quot;The LJ-Solid Equation of State Extended to Thermal Properties, Chain Molecules, and Mixtures&amp;quot;, Industrial and Engineering Chemistry Research &#039;&#039;&#039;43&#039;&#039;&#039; pp. 6890 - 6897 (2004)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.1823371     David M. Eike, Joan F. Brennecke, and Edward J. Maginn &amp;quot;Toward a robust and general molecular simulation method for computing solid-liquid coexistence&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;122&#039;&#039;&#039; 014115 (2005)]&lt;br /&gt;
*[http://dx.doi.org/10.1063/1.3561698 Sergey A. Khrapak and Gregor E. Morfill &amp;quot;Accurate freezing and melting equations for the Lennard-Jones system&amp;quot;, Journal of Chemical Physics &#039;&#039;&#039;134&#039;&#039;&#039; 094108 (2011)]&lt;br /&gt;
*[https://doi.org/10.1063/1.4945000 Monika Thol, Gabor Rutkai, Andreas Köster, Rolf Lustig, Roland Span, and Jadran Vrabec &amp;quot;Equation of State for the Lennard-Jones Fluid&amp;quot;, Journal of Physical and Chemical Reference Data &#039;&#039;&#039;45&#039;&#039;&#039; 023101 (2016)]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{Numeric}}&lt;br /&gt;
[[category: equations of state]]&lt;/div&gt;</summary>
		<author><name>95.90.228.132</name></author>
	</entry>
</feed>