Gas Property Demonstrations Using Plastic Water Bottles

Campbell, Dean J.; Bannon, Stephen J.; Gunter, Molly M.

doi:10.1021/ed100745c

Cited by 8 publications

(8 citation statements)

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“…Bottles should be replaced and recycled if they have deformed beyond the point of reuse (e.g., a bottle mouth no longer points in its original direction). 11…”

Section: Basic Demonstration Of the Rocket Carmentioning

confidence: 99%

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Improvements to the Whoosh Bottle Rocket Car Demonstration

2015

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“…Bottles should be replaced and recycled if they have deformed beyond the point of reuse (e.g., a bottle mouth no longer points in its original direction). 11…”

Section: Basic Demonstration Of the Rocket Carmentioning

confidence: 99%

“…Wet bottles need to be dried completely before they can be used again, but bottles that have not deformed too much from the heat of combustion can be reused. Bottles should be replaced and recycled if they have deformed beyond the point of reuse (e.g., a bottle mouth no longer points in its original direction) …”

Section: Demonstrationmentioning

confidence: 99%

Improvements to the Whoosh Bottle Rocket Car Demonstration

2015

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“…The ideal gas law ( PV = nRT ) is one of the early discoveries in science commonly taught in introductory level chemistry. , The concept of the gas law is the integral foundation for other advanced topics in chemistry and physics. Many authors − have devised experiments to teach Boyle’s law − ( P ∝ 1/ V ) and Charles’ law ( V ∝ T ) to students in secondary and tertiary levels. In earlier times, most procedures ,,,, were used for demonstration by instructors rather than for student laboratory exercises because of difficulties in setup and operation and the cost to run the experiments.…”

Section: Introductionmentioning

confidence: 99%

Teaching Boyle’s Law and Charles’ Law through Experiments that Use Novel, Inexpensive Equipment Yielding Accurate Results

et al. 2018

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We discuss the use of a simple piece of equipment made of a 50 mL syringe attached to a 2 mL graduated pipet to demonstrate Boyle's law and Charles's law. A plot of the hydrostatic pressure against the reciprocal of the volume of the gas read from the equipment is linear as discussed in the paper and gives the atmospheric pressure at the y-intercept. A plot of the volume of the gas against the Celsius temperature of the gas is also linear as discussed in the paper and gives the absolute zero at the x-intercept. This plastic "high-precision syringe" is simple, disposable, and inexpensive (<1 USD per set) but can yield a high correlation coefficient (class median r 2 ≥ 0.95) and accurate results (class median within 1% from P atm = 101 kPa or within 5 °C from −273 °C). These results are achieved because changes in gas volume are read precisely on the graduated lines of the pipet, and the change is significant because of the amount of gas in the syringe. In addition to the two gas laws, this experiment can also be used to teach glassware scale reading, error analysis, use of a spreadsheet program, and statistical analysis.

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“…Há na literatura várias experiências em que o nitrogénio líquido é usado com fins pedagógicos para ilustrar a composição do ar, 6 as leis de Boyle, 7 de Charles ou de Avogadro, 8 ou ainda para fazer sorvete 9 ou truques com balões. [10][11][12][13] Todavia, tanto quanto averiguamos não encontramos descrições de experiências com objetivos pedagógicos em que sejam efectuadas medidas de volume ou pressão, associadas à contração ou expansão do ar.…”

Section: Introductionunclassified

Breathing and Instructing With Air

Carvalho¹,

Silva²,

Diogo³

2016

Química Nova

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Recebido em 18/01/2016; aceito em 25/04/2016; publicado na web em 08/07/2016 BREATHING AND INSTRUCTING WITH AIR. 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.Keywords: phase transitions; ideal gas equation; air composition; intermolecular forces. INTRODUÇÃOO ar que respiramos é essencial à vida, mas é também um recurso que pode ser usado com objetivos pedagógicos. As experiências aqui descritas usam o ar como fonte de gases, por ser uma mistura facilmente acessível e barata. O nitrogénio (nitrogênio), que é o componente mais abundante do ar (cerca de 78,1% em volume) pode ser usado no estado líquido como agente de refrigeração. À pressão atmosférica, o nitrogénio liquefaz à temperatura de -195,8 °C. 1,2 A essa temperatura o oxigénio (O 2 , cerca de 21% do ar em volume), que apresenta uma temperatura de ebulição mais elevada, encontra-se também no estado líquido (ponto de ebulição = -183,0 °C) 1 enquanto que, o dióxido de carbono (CO 2 ; cerca de 0,03%) e a água (H 2 O; variável) passam ao estado sólido a -78,5 °C e 0 °C, respetivamente. Para além destes componentes, é ainda significativa a quantidade de árgon (argónio; cerca de 0,9% em volume).3 A propósito da composição do ar, pode referir-se que a evolução da vida na Terra está associada à variação dos teores dos componentes da atmosfera ao longo dos tempos. Por exemplo, na Era Paleozoica (há cerca de 350 a 250 milhões de anos) o teor de oxigénio (constituinte capturado do ar pelos organismos vivos e fundamental para os processos metabólicos associados ao voo) na atmosfera era mais elevado do que presentemente, o que favoreceu a existência de animais voadores com dimensões superiores, em comparação com os atuais. Nessa altura e tendo em consideração a relevância do oxigénio nas combustões, 4,5 havia também condições mais favoráveis ao aparecimento e propagação de incêndios florestais.Há na literatura várias experiências em que o nitrogénio líquido é usado com fins pedagógicos para ilustrar a composição do ar, 6 as leis de Boyle, 7 de Charles ou de Avogadro, 8 ou ainda para fazer sorvete 9 ou truques com balões.10-13 Todavia, tanto quanto averiguamos não encontramos descrições de experiências com objetivos pedagógicos em que sejam efectuadas medidas de volume ou pressão, associadas à contração ou expansão do ar. No sentido de preencher essa lacun...

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Gas Property Demonstrations Using Plastic Water Bottles

Cited by 8 publications

References 5 publications

Improvements to the Whoosh Bottle Rocket Car Demonstration

Improvements to the Whoosh Bottle Rocket Car Demonstration

Teaching Boyle’s Law and Charles’ Law through Experiments that Use Novel, Inexpensive Equipment Yielding Accurate Results

Breathing and Instructing With Air

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