Experimentação em quimica : alternativas para a termoquimica no ensino medio / Experimental in chemistry : alternatives for teaching thermochemistry in the high school

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Experimentation in chemistry: alternatives for teaching thermochemistry in the high school. This work supplies experimental situations for teaching thermochemistry in high school as a alternative way to present this subject in addition to theoretical base related to the subject. The work beguins with the analysis of a significant number of traditional and commercially expressives text books suitable for the high school concerning to the main subject. The developed experiments were tested in chemical laboratory bench with scientific rigor and were adapted for the actual conditions of Brazilian schools. A termistor used as a temperature sensor is the fundamental tool in the development of the experiments. The official programs of teaching of chemistry, the accebility and low cost of the materials were the main aspects taken into account in order to develop the experiments. The accurace and precision of the experimental results are present in order to allow a critical analysis concerning to the appropriated approaches, probably mistakes, uncertainties and conclusions related to the subject. The main strategy used in this work was to develop experiments that don t use expensive instruments, or generate hazardous chemicals or involving periculosity.

ASSUNTO(S)

experimentação calorimetria high school termoquimica thermochemistry ensino medio calorimetry experiments

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