<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-893X</journal-id>
<journal-title><![CDATA[Educación química]]></journal-title>
<abbrev-journal-title><![CDATA[Educ. quím]]></abbrev-journal-title>
<issn>0187-893X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Química]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-893X2015000300187</article-id>
<article-id pub-id-type="doi">10.1016/j.eq.2015.05.003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Van der Waals, más que una ecuación cúbica de estado]]></article-title>
<article-title xml:lang="en"><![CDATA[Van der Waals, more than a cubic equation of state]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duque Vega]]></surname>
<given-names><![CDATA[Paola R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gracia-Fadrique]]></surname>
<given-names><![CDATA[Jesus]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Química Laboratorio de Superficies]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>26</volume>
<numero>3</numero>
<fpage>187</fpage>
<lpage>194</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2015000300187&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2015000300187&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2015000300187&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El presente artículo analiza las aportaciones de van der Waals al estudio de los gases, en el contexto histórico de su época. Se consideran algunos antecedentes científicos y tecnológicos paralelos, a fin de que el lector pueda apreciar el papel que tuvo el estudio de los gases en el desarrollo de la primera y la segunda revolución industrial. La aportación de van der Waals no solo es la ecuación cúbica de estado, máximo de su tesis doctoral, sino que también incursiona en la teoría de estados correspondientes y en el comportamiento de la tensión superficial en las vecindades del punto crítico. Se concluye que el exponente reportado por van der Waals en tensión superficial continua vigente y que la periodicidad de las constantes de la ecuación cúbica propuesta, muestra un panorama novedoso, donde los volúmenes molares a temperatura ambiente resultan cercanos a la constante volumétrica y la constante atractiva aumenta con la masa molecular.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The present paper analyzes van der Waals's contributions to the study of gases in his historical context. Is under consideration some parallel scientific and technological background, so the reader can notice the role that the study of gases played in the development of the first and the second industrial revolutions. Van der Waals' contributions go beyond his cubic state equation- high light of his doctoral thesis-, he also goes into the correspondent state theory and the surface tension behavior near the critical point. It is concluded that the exponent reported by van der Waals for surface tension remains current and that the proposed periodicity for cubic equation constants shows an innovative panorama, where the molar volumes, at environmental temperature, are close to the volumetric constant and the attractive constant increases with the molecular mass.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Estudio de los gases]]></kwd>
<kwd lng="es"><![CDATA[Contexto histórico]]></kwd>
<kwd lng="es"><![CDATA[Ecuación cúbica de estado]]></kwd>
<kwd lng="es"><![CDATA[van der Waals]]></kwd>
<kwd lng="es"><![CDATA[Teoría de los estados correspondientes]]></kwd>
<kwd lng="es"><![CDATA[Tensión superficial]]></kwd>
<kwd lng="es"><![CDATA[Punto crítico]]></kwd>
<kwd lng="es"><![CDATA[Periodicidad]]></kwd>
<kwd lng="en"><![CDATA[Gas study]]></kwd>
<kwd lng="en"><![CDATA[Historical context]]></kwd>
<kwd lng="en"><![CDATA[State cubic equation]]></kwd>
<kwd lng="en"><![CDATA[van der Waals]]></kwd>
<kwd lng="en"><![CDATA[Correspondent state theory]]></kwd>
<kwd lng="en"><![CDATA[Surface tension]]></kwd>
<kwd lng="en"><![CDATA[Critical point]]></kwd>
<kwd lng="en"><![CDATA[Periodicity]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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