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Descripción
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| Two commercial self-heating food products have been used to apply chemical concepts such as stoichiometry, enthalpies of reactions and solutions, and heat transfer in a classroom activity. These products are the self-heating or "autocalentables" beverages sold in Europe and the Meals Ready to Eat or "MREs" used by the military in the United States. The main goal of the activity is to propose a real-life chemistry problem to the class for which students will need to calculate the heat produced by the chemical reaction or the dissolution process, the accompanying theoretical change in temperature and finally compare the theoretical change to the temperature observed. The activity is designed to use only 5 minutes of class time and allow students to work in groups, outside the classroom, to solve the problem posted. Authors have used two different methodologies with this activity, Problem-Based Learning and Inquiry-Guided Instruction. The context of these activities allows connecting a variety of chemistry topics and provides the opportunity to practice commonly needed operations such as unit conversion and algorithmic problem solving with a purpose. The key element is the evaluation process that students must conduct at every stage, which includes examining food products promotion information. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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JOURNAL OF CHEMICAL EDUCATION |
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ISSN
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0021-9584 |
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Factor de impacto JCR
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0,538 |
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Información de impacto
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Volumen
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86 |
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DOI
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Número de revista
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0 |
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Desde la página
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1277 |
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Hasta la página
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1280 |
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Mes
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ENERO |
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Ranking
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