Estudo do uso de uma abordagem metodológica construtivista adaptada para atividades experimentais de cinética química

Abstract

It is known that one of the criticisms that is made regarding the teaching of chemistry, refers to the discipline being excessively explaned by the teacher, often without the use of experi-mentation and with decontextualized and monotonous classes. The present work presents an adapted approach of the POE method (predict, observe and explain) used in chemical kinetics experiments. It aims to improve the teaching-learning process of chemistry with the aim of providing participation in the experimental classes and the interaction of the students with the contents in the activities carried out. The experiments developed allow the students to interact with the concepts in the stages of the POE, leading them to an active posture in learning. The work was developed with two second-year classes (3201- with POE methodology and 3202 without POE methodology). Experiments were performed evaluating the effect of temperature and contact surface on the speed of chemical reactions and subsequent application of identical questionnaire for both groups. The results show the potential of applying experimental classes in the discipline of chemistry, giving a differentiated approach to teaching and learning to students. It was also possible to observe the importance of using collision theory as a tool for the construction of arguments at the atomic-molecular level, since the students of the class in which the methodology was applied obtained better performances in the evaluated instruments, POE and in the post-activity questionnaire.