Español The concepts of enthalpy, entropy and equilibrium in chemical reactions in High School. Proposal didactic for teaching and learning
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Abstract
A didactic sequence is presented with the aim of enabling students to integrate the concepts of enthalpy, entropy, chemical reaction, and balance into their daily lives through the Project-Based Learning (PjBL) strategy. The strategy was applied in a group of the High School. A project was assigned to each team of 4-5 students. The projects developed were the obtaining of a white bioglue for home consumption, the neutralization of stomach acidity and the oxidation of hydrocarbons. At each stage of the project, students took responsibility for their own learning and the teacher served only as a guide. Before and after the implementation of the strategy, a questionnaire with multiple-choice and open-ended questions was applied. Based on the results, an improvement was observed in the correlation of the concepts of enthalpy, entropy and equilibrium with chemical reactions and their importance in everyday life. Also, it was evidenced that the alternative conceptions of the concepts of temperature, heat, work, enthalpy, entropy, spontaneity and chemical equilibrium were reduced, when analyzed from chemistry in context.
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