Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais

Detalhes bibliográficos
Autor(a) principal: Barboza,Ana Claudia R. N.
Data de Publicação: 2001
Outros Autores: Cruz,Camila V. M. S., Graziani,Marcelo B., Lorenzetti,Myrian C. F., Sabadini,Edvaldo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000600030
Resumo: The microwave oven became a common domestic equipment, due mainly to the short time spent to heat foods. One of the most interesting characteristics of the microwave oven is the selective heating. Different from the conventional oven, where the heating is not selective, the heating by microwave depends on the chemical nature of the matter. Many Students of Chemistry have no knowledge of the principles involved in this selective heating, in spite of the daily microwave oven use. The heating by microwave is feasible for chemistry courses. In discussions about the microwave absorption by the matter it is possible to explore chemical properties like: heat capacity, chemical bound, molecular structure, dipole moments, polarization and dielectric constant. This paper presents the basic principles involved in the microwave heating. It is proposed a simple and inexpensive experiment that could be developed in general chemistry courses, to illustrate the relationship between heating and the chemical properties of some solvents. Experiments to check the power of the microwave oven are also proposed.
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spelling Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentaismicrowave oveneducational experimentsbasic conceptsThe microwave oven became a common domestic equipment, due mainly to the short time spent to heat foods. One of the most interesting characteristics of the microwave oven is the selective heating. Different from the conventional oven, where the heating is not selective, the heating by microwave depends on the chemical nature of the matter. Many Students of Chemistry have no knowledge of the principles involved in this selective heating, in spite of the daily microwave oven use. The heating by microwave is feasible for chemistry courses. In discussions about the microwave absorption by the matter it is possible to explore chemical properties like: heat capacity, chemical bound, molecular structure, dipole moments, polarization and dielectric constant. This paper presents the basic principles involved in the microwave heating. It is proposed a simple and inexpensive experiment that could be developed in general chemistry courses, to illustrate the relationship between heating and the chemical properties of some solvents. Experiments to check the power of the microwave oven are also proposed.Sociedade Brasileira de Química2001-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000600030Química Nova v.24 n.6 2001reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422001000600030info:eu-repo/semantics/openAccessBarboza,Ana Claudia R. N.Cruz,Camila V. M. S.Graziani,Marcelo B.Lorenzetti,Myrian C. F.Sabadini,Edvaldopor2002-02-08T00:00:00Zoai:scielo:S0100-40422001000600030Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2002-02-08T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
title Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
spellingShingle Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
Barboza,Ana Claudia R. N.
microwave oven
educational experiments
basic concepts
title_short Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
title_full Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
title_fullStr Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
title_full_unstemmed Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
title_sort Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
author Barboza,Ana Claudia R. N.
author_facet Barboza,Ana Claudia R. N.
Cruz,Camila V. M. S.
Graziani,Marcelo B.
Lorenzetti,Myrian C. F.
Sabadini,Edvaldo
author_role author
author2 Cruz,Camila V. M. S.
Graziani,Marcelo B.
Lorenzetti,Myrian C. F.
Sabadini,Edvaldo
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Barboza,Ana Claudia R. N.
Cruz,Camila V. M. S.
Graziani,Marcelo B.
Lorenzetti,Myrian C. F.
Sabadini,Edvaldo
dc.subject.por.fl_str_mv microwave oven
educational experiments
basic concepts
topic microwave oven
educational experiments
basic concepts
description The microwave oven became a common domestic equipment, due mainly to the short time spent to heat foods. One of the most interesting characteristics of the microwave oven is the selective heating. Different from the conventional oven, where the heating is not selective, the heating by microwave depends on the chemical nature of the matter. Many Students of Chemistry have no knowledge of the principles involved in this selective heating, in spite of the daily microwave oven use. The heating by microwave is feasible for chemistry courses. In discussions about the microwave absorption by the matter it is possible to explore chemical properties like: heat capacity, chemical bound, molecular structure, dipole moments, polarization and dielectric constant. This paper presents the basic principles involved in the microwave heating. It is proposed a simple and inexpensive experiment that could be developed in general chemistry courses, to illustrate the relationship between heating and the chemical properties of some solvents. Experiments to check the power of the microwave oven are also proposed.
publishDate 2001
dc.date.none.fl_str_mv 2001-12-01
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=S0100-40422001000600030
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000600030
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422001000600030
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.24 n.6 2001
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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