COM AR - RESPIRAR E ENSINAR

Detalhes bibliográficos
Autor(a) principal: Carvalho,Maria Fernanda N. N.
Data de Publicação: 2016
Outros Autores: Silva,José Armando L. da, Diogo,Hermínio P.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000901136
Resumo: A set of quasi-quantitative experiments are described to relate volume and pressure variations associated to the phase changes of the main components of the air. The processes are promoted by variation of temperature using liquid nitrogen to refrigerate the air and get liquid oxygen, traces of dry ice and ice. The changes in volume and pressure associated to oxygen phase changes are used to discuss and rationalize phenomena as different as the effects of intermolecular forces on the properties of substances, industrial accidents resulting from a sudden pressure increase due to undesired reactions or even rationalize how popcorns are made. The ludic character of some of the experiments aims to promote the interest and curiosity of youngsters on scientific issues.
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spelling COM AR - RESPIRAR E ENSINARphase transitionsideal gas equationair compositionintermolecular forcesA set of quasi-quantitative experiments are described to relate volume and pressure variations associated to the phase changes of the main components of the air. The processes are promoted by variation of temperature using liquid nitrogen to refrigerate the air and get liquid oxygen, traces of dry ice and ice. The changes in volume and pressure associated to oxygen phase changes are used to discuss and rationalize phenomena as different as the effects of intermolecular forces on the properties of substances, industrial accidents resulting from a sudden pressure increase due to undesired reactions or even rationalize how popcorns are made. The ludic character of some of the experiments aims to promote the interest and curiosity of youngsters on scientific issues.Sociedade Brasileira de Química2016-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000901136Química Nova v.39 n.9 2016reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0100-4042.20160119info:eu-repo/semantics/openAccessCarvalho,Maria Fernanda N. N.Silva,José Armando L. daDiogo,Hermínio P.por2016-11-23T00:00:00Zoai:scielo:S0100-40422016000901136Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2016-11-23T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv COM AR - RESPIRAR E ENSINAR
title COM AR - RESPIRAR E ENSINAR
spellingShingle COM AR - RESPIRAR E ENSINAR
Carvalho,Maria Fernanda N. N.
phase transitions
ideal gas equation
air composition
intermolecular forces
title_short COM AR - RESPIRAR E ENSINAR
title_full COM AR - RESPIRAR E ENSINAR
title_fullStr COM AR - RESPIRAR E ENSINAR
title_full_unstemmed COM AR - RESPIRAR E ENSINAR
title_sort COM AR - RESPIRAR E ENSINAR
author Carvalho,Maria Fernanda N. N.
author_facet Carvalho,Maria Fernanda N. N.
Silva,José Armando L. da
Diogo,Hermínio P.
author_role author
author2 Silva,José Armando L. da
Diogo,Hermínio P.
author2_role author
author
dc.contributor.author.fl_str_mv Carvalho,Maria Fernanda N. N.
Silva,José Armando L. da
Diogo,Hermínio P.
dc.subject.por.fl_str_mv phase transitions
ideal gas equation
air composition
intermolecular forces
topic phase transitions
ideal gas equation
air composition
intermolecular forces
description A set of quasi-quantitative experiments are described to relate volume and pressure variations associated to the phase changes of the main components of the air. The processes are promoted by variation of temperature using liquid nitrogen to refrigerate the air and get liquid oxygen, traces of dry ice and ice. The changes in volume and pressure associated to oxygen phase changes are used to discuss and rationalize phenomena as different as the effects of intermolecular forces on the properties of substances, industrial accidents resulting from a sudden pressure increase due to undesired reactions or even rationalize how popcorns are made. The ludic character of some of the experiments aims to promote the interest and curiosity of youngsters on scientific issues.
publishDate 2016
dc.date.none.fl_str_mv 2016-11-01
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=S0100-40422016000901136
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000901136
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.5935/0100-4042.20160119
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.39 n.9 2016
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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