Aquecimento em forno de microondas / desenvolvimento de alguns conceitos fundamentais
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , , |
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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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 |
_version_ |
1750318102357213185 |