Boiling water at room temperature?

• Autor(a) principal: Catelli, Francisco
• Data de Publicação: 2014
• Outros Autores: Barbieri, Rodrigo, Schneider, Vânia
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Caderno Brasileiro de Ensino de Física (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2014v31n3p677

A reduced cost experimental procedure, in which the boiling point of  water  at  room  temperature  is  obtained,  is  presented.  This procedure involves the introduction of water inside a fluorescent lamp discarded by techniques already described in the literature and included in this study. In addition to the observation of the room temperature boiling, the internal pressure of fluorescent lamps can be experimentally consistently obtained through the use of tap water previously boiled, which leads to the elimination of gaseous  impurities  dissolved  therein;  it  is  also  suggested  a technique to make more accurate the determination of the volume occupied by gases in the lamp. Steps to reduce to a minimum level of  contamination  when  performing  this  procedure  in  a  school environment are described.