FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO

Detalhes bibliográficos
Autor(a) principal: Pliego Jr.,Josefredo R.
Data de Publicação: 2022
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422022000300292
Resumo: The formation of azeotropes is related to the deviation of the ideality of liquid mixtures. This deviation is expressed by the activity coefficient of each component. However, the physical origin of this behavior is not well quantified in terms of molecular interactions. In this work, a regular solution model was used, relating the β parameter to the solvation free energy of pure liquids in themselves and in the other component. A mathematical expression was derived that indicates when an azeotrope is formed. This equation shows that the greater the difference in vapour pressure between components, the greater the solvation difference of each liquid in itself and in the other component is needed to form the azeotrope. A set of 10 mixtures were randomly chosen and investigated as a test, and the equation worked in all cases.
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spelling FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃOMargules equationliquid-vapour equilibriumRedlich-Kister expansioninfinity dilution activity coefficientThe formation of azeotropes is related to the deviation of the ideality of liquid mixtures. This deviation is expressed by the activity coefficient of each component. However, the physical origin of this behavior is not well quantified in terms of molecular interactions. In this work, a regular solution model was used, relating the β parameter to the solvation free energy of pure liquids in themselves and in the other component. A mathematical expression was derived that indicates when an azeotrope is formed. This equation shows that the greater the difference in vapour pressure between components, the greater the solvation difference of each liquid in itself and in the other component is needed to form the azeotrope. A set of 10 mixtures were randomly chosen and investigated as a test, and the equation worked in all cases.Sociedade Brasileira de Química2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422022000300292Química Nova v.45 n.3 2022reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0100-4042.20170824info:eu-repo/semantics/openAccessPliego Jr.,Josefredo R.por2022-05-16T00:00:00Zoai:scielo:S0100-40422022000300292Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2022-05-16T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
title FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
spellingShingle FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
Pliego Jr.,Josefredo R.
Margules equation
liquid-vapour equilibrium
Redlich-Kister expansion
infinity dilution activity coefficient
title_short FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
title_full FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
title_fullStr FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
title_full_unstemmed FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
title_sort FORMAÇÃO DE AZEÓTROPOS DO PONTO DE VISTA DA TERMODINÂMICA DE SOLVATAÇÃO
author Pliego Jr.,Josefredo R.
author_facet Pliego Jr.,Josefredo R.
author_role author
dc.contributor.author.fl_str_mv Pliego Jr.,Josefredo R.
dc.subject.por.fl_str_mv Margules equation
liquid-vapour equilibrium
Redlich-Kister expansion
infinity dilution activity coefficient
topic Margules equation
liquid-vapour equilibrium
Redlich-Kister expansion
infinity dilution activity coefficient
description The formation of azeotropes is related to the deviation of the ideality of liquid mixtures. This deviation is expressed by the activity coefficient of each component. However, the physical origin of this behavior is not well quantified in terms of molecular interactions. In this work, a regular solution model was used, relating the β parameter to the solvation free energy of pure liquids in themselves and in the other component. A mathematical expression was derived that indicates when an azeotrope is formed. This equation shows that the greater the difference in vapour pressure between components, the greater the solvation difference of each liquid in itself and in the other component is needed to form the azeotrope. A set of 10 mixtures were randomly chosen and investigated as a test, and the equation worked in all cases.
publishDate 2022
dc.date.none.fl_str_mv 2022-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422022000300292
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422022000300292
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.21577/0100-4042.20170824
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.45 n.3 2022
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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