<?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>S0187-893X2023000200212</article-id>
<article-id pub-id-type="doi">10.22201/fq.18708404e.2023.2.83273</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Secado de PET contrastando hornos de microondas y eléctrico]]></article-title>
<article-title xml:lang="en"><![CDATA[PET drying contrasting microwave and electric ovens]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamorano Romero]]></surname>
<given-names><![CDATA[Cosme]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacios Alquisira]]></surname>
<given-names><![CDATA[Joaquín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Química ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>34</volume>
<numero>2</numero>
<fpage>212</fpage>
<lpage>223</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2023000200212&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2023000200212&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2023000200212&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de este trabajo consistirá en revisar conceptos termodinámicos como la Primera Ley de la Termodinámica y calor, y cómo pueden aplicarse en el cálculo de la energía necesaria para el secado de un material humedo. Se desarrolla una comparación, entre la energía necesaria para disminuir la humedad de hojuela de PET (Polietilen Tereftalato) mediante el uso de un horno eléctrico y otro que usa microondas. Se presenta un trabajo práctico, útil para bachillerato y primer semestre de carreras de ingeniería química. Se tomaron los datos de experimentos realizados y corroborados en el laboratorio (Hernández, 2006), los cuales se realizaron con muestras de hojuela de PET obtenidas de botellas de bebidas carbonatadas, con las mismas propiedades fisicoquímicas. De los resultados observados se puede concluir que el uso de microondas en el secado de PET reduce el consumo de energía.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This paper reviews the thermodynamic concepts of First Law of Thermodynamics and heat and how they are applied to calculate the energy required for drying. To this end, the energy required for PET (Polyethylene Terephthalate) flake drying using an electric oven and a microwave oven is compared. Practical, helpful work in high school and first chemical engineering courses is presented. The experimental data arose from tests conducted in the laboratory and corroborated elsewhere (Hernández, 2006). They were obtained for PET flakes from soft drink bottles; they had the same physicochemical properties. From the observed results, it can be concluded that the microwave treatment of PET reduces energy consumption compared to the electric oven.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Calor]]></kwd>
<kwd lng="es"><![CDATA[microondas]]></kwd>
<kwd lng="es"><![CDATA[ahorro de energía]]></kwd>
<kwd lng="es"><![CDATA[secado]]></kwd>
<kwd lng="es"><![CDATA[PET]]></kwd>
<kwd lng="en"><![CDATA[Heat]]></kwd>
<kwd lng="en"><![CDATA[microwave]]></kwd>
<kwd lng="en"><![CDATA[saving of energy]]></kwd>
<kwd lng="en"><![CDATA[drying]]></kwd>
<kwd lng="en"><![CDATA[PET]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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