Cinética química no ensino médio: Uma sequência didática baseada em experimentação e estudo de caso

Abstract

Chemical kinetics studies the speed of reactions and the factors that influence it. In high school, approaching this content presents challenges, especially due to its abstract nature and the lack of experimentation in many schools. This work aims to investigate the impact of a didactic sequence based on experimentation and case studies on the learning of Chemical Kinetics by second year high school students. To this end, a didactic sequence was applied to a class at the José Basson School Unit in Cocal-PI, con sisting of lectures, low-cost experiments, a case study and a reflective conversation circle. Analysis of the answers to the questionnaires applied before and after the intervention showed a significant improvement in the students' understanding of the factors that influence the speed of reactions. In addition, the experimentation aroused greater interest in the subject and enabled more contextualized and meaningful learning. The case study favored the application of theoretical concepts in real situations, contributing to the development of students' critical thinking. The research reinforces the importance of using active methodologies in chemistry teaching, highlighting experimentation and case studies as effective tools for building scientific knowledge