<?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>0250-5460</journal-id>
<journal-title><![CDATA[Revista Boliviana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Bol. Quim]]></abbrev-journal-title>
<issn>0250-5460</issn>
<publisher>
<publisher-name><![CDATA[Universidad Mayor de San Andrés]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0250-54602021000400168</article-id>
<article-id pub-id-type="doi">10.34098/2078-3949.38.4.4</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la temperatura sobre las propiedades acústicas y volumétricas de mezclas binarias líquidas de Propanonitrilo y Propanoato de Metilo, y de Propanonitrilo y Propanoato de Etilo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Canzonieri]]></surname>
<given-names><![CDATA[Salvador H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mariano]]></surname>
<given-names><![CDATA[Alejandra B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orozco]]></surname>
<given-names><![CDATA[Mirtha A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romaní]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,aff1  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,aff2  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,aff3  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<volume>38</volume>
<numero>4</numero>
<fpage>168</fpage>
<lpage>181</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S0250-54602021000400168&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S0250-54602021000400168&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S0250-54602021000400168&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se informan en este trabajo las densidades (&#961;) y las velocidades del sonido (u) de las mezclas líquidas binarias formadas por propanonitrilo + propanoato de metilo y propanonitrilo + propanoato de etilo, incluidas las de los líquidos puros, en un rango de temperatura de 278.15 K a 318.15 K a intervalos de 5 K. La densidad y la velocidad del sonido se midieron en todo el rango de composición a la presión atmosférica. Los datos experimentales se utilizaron para calcular el volumen molar V(x, T), el volumen molar de exceso VE(x, T), la desviación en la velocidad del sonido &#916;u(x, T), la compresibilidad isoentrópica Ks(x, T), la compresibilidad isoentrópica de exceso KE S (x, T), el coeficiente de expansión térmica &#945;(x, T) y el coeficiente de expansión térmica de exceso &#945;E(x, T). Cada conjunto de resultados de las propiedades de exceso se ajustó a una ecuación polinómial como la ecuación de Redlich-Kister (1), obteniéndose desviaciones del orden de error experimental. Los valores de exceso de las mezclas estudiadas fueron negativos para todo el rango de composición y para todas las temperaturas. Los resultados se discutieron en términos de las interacciones moleculares y los efectos estructurales. Se utilizaron los modelos propuestos por Nomoto (2),(3), Van Dael (4) y Ernst et al. (5) para calcular la velocidad del sonido a 298.15 K.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The densities (&#961;) and speeds of sound (u) of binary liquid mixtures formed by propanonitrile + methyl propanoate and propanonitrile + ethyl propanoate, including those of the pure liquids, at a temperature range from 278.15 K to 318.15 K every 5 K are reported in this paper. The density and speed of sound were measured over the complete composition range at the atmospheric pressure. The experimental data were used to calculate the molar volume V (x, T), excess molar volume VE (x, T), the deviation in speed of sound &#916;u (x, T), the isoentropic compressibility Ks (x, T), the excess isoentropic compressibility KE S (x, T), the thermal expansion coefficient &#945; (x, T) and the excess thermal expansión coeffi-cient &#945;E (x, T). Every set of results of the properties of the excess was fitted to a polynomial equation like the Redlich-Kister equation (1), the deviations obtained were of the order of experimental error. The excess values of the mixtures studied were negative for the entire composition range and all temperatures. The results have been discussed in terms of molecular interactions and structural effects. The models proposed by Nomoto (2),(3), Van Dael (4) y Ernst et al. (5) were used to calculate the speed of sound at 298.15 K.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Propanonitrile]]></kwd>
<kwd lng="en"><![CDATA[Methyl propanoate]]></kwd>
<kwd lng="en"><![CDATA[Ethyl propanoate]]></kwd>
<kwd lng="en"><![CDATA[Excess molar volumen]]></kwd>
<kwd lng="en"><![CDATA[Excess isoentropic compressibility]]></kwd>
<kwd lng="en"><![CDATA[Speed of sound]]></kwd>
<kwd lng="en"><![CDATA[Thermal expansion coefficient]]></kwd>
<kwd lng="es"><![CDATA[Propanonitrilo]]></kwd>
<kwd lng="es"><![CDATA[Propanoato de metilo]]></kwd>
<kwd lng="es"><![CDATA[Propanoato de etilo]]></kwd>
<kwd lng="es"><![CDATA[Exceso de volumen molar]]></kwd>
<kwd lng="es"><![CDATA[Exceso de compresibilidad isoentrópica]]></kwd>
<kwd lng="es"><![CDATA[Velocidad del sonido]]></kwd>
<kwd lng="es"><![CDATA[Coeficiente de expansión térmica]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Redlich]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Algebraic representation of thermodynamic properties and the classification of solutions]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Kister]]></surname>
<given-names><![CDATA[A.T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ind. Eng. Chem.]]></source>
<year>1948</year>
<volume>40</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>345-8</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nomoto]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Empirical Formula for Sound Velocity in Liquid Mixtures]]></article-title>
<source><![CDATA[J. Phys. Soc. Jpn.]]></source>
<year>1958</year>
<volume>13</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>1528-32</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nomoto]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Molecular Sound Velocity and Molecular Compressibility of Liquid Mixtures]]></article-title>
<source><![CDATA[J. Phys. Soc. Jpn.]]></source>
<year>1953</year>
<volume>8</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>553-60</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Van Dael]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thermodynamic Properties and Velocity of Sound. Butterworths]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Le Neindre]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Vodar]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Experimental Thermodynamics]]></source>
<year></year>
<edition>Volume II</edition>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ernst]]></surname>
<given-names><![CDATA[S.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dependence of the ultrasound velocity on association of liquids]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Glinski]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Jezowska-Trzebiatowska]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Acta Phys. Polon]]></source>
<year>1979</year>
<volume>55</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>501-16</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Canzonieri]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of temperature on acoustic and volumetric properties of liquid binary mixtures of propanenitrile and butyl acetate, and of liquid binary mixtures of propanenitrile and pentyl acetate]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Mariano]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Camacho]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Orozco]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Romaní]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bolivian Journal of Chemistry]]></source>
<year>2018</year>
<volume>35</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>85-97</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<collab>TRC</collab>
<source><![CDATA[Thermodynamic Tables Non Hydrocarbons. Thermodynamic Research Center]]></source>
<year>1993</year>
<publisher-name><![CDATA[Texas A&amp;M University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bilaniuk]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Erratum: Speed of sound in pure water as a function of temperature]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[G.S.K.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Acoust. Soc. Am.]]></source>
<year>1996</year>
<numero>93</numero>
<issue>93</issue>
<page-range>1609-12</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marsh]]></surname>
<given-names><![CDATA[K.N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enthalpies of mixing of n-hexane + cyclohexane at 25 °C, J. Chem. Thermodynamics]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Stokes]]></surname>
<given-names><![CDATA[R.H.]]></given-names>
</name>
</person-group>
<source><![CDATA[]]></source>
<year>1969</year>
<volume>1</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>223-5</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Franjo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Viscosities and Densities of Solutions of n-Decane, or n-Tetradecane with Several Esters at 25°C]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Segade]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Menaut]]></surname>
<given-names><![CDATA[C.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Pico]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Sol. Chem]]></source>
<year>2001</year>
<numero>30</numero>
<issue>30</issue>
<page-range>995-1006</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Troncoso]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Systematic Determination of Densities and Speeds of Sound of Nitroethane + Isomers of Butanol in the Range (283.15&#8722;308.15) K]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Carballo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Cerdeiriña]]></surname>
<given-names><![CDATA[C.A.]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Romaní]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Eng. Data]]></source>
<year>2000</year>
<volume>45</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>594-9</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mehta]]></surname>
<given-names><![CDATA[S.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of #cn group on isentropic compressibility and volumetric parameters of mixtures of &#947;-butyrolactam (n = 5) and nitriles]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[A.K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fluid Phase Equilibria]]></source>
<year>2003</year>
<volume>205</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>37-51</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
