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Kodani, Satoki; Koga, Nobuyoshi – Journal of Chemical Education, 2021
A newly developed laboratory learning program for high school chemistry courses is discussed, in which students discover the chemical mechanism governing exothermic phenomena during the reaction between a heating agent, namely, calcium oxide (CaO)--aluminum (Al) mixture, and water. Based on prior knowledge of simple heating agents such as CaO, the…
Descriptors: Science Instruction, Secondary School Science, High School Students, Science Experiments
Tatsuoka, Tomoyuki; Koga, Nobuyoshi – Journal of Chemical Education, 2013
Drawing a schematic energy diagram for the decomposition of H[subscript 2]O[subscript 2] catalyzed by MnO[subscript 2] through a simple thermometric measurement outlined in this study is intended to integrate students' understanding of thermochemistry and kinetics of chemical reactions. The reaction enthalpy, delta[subscript r]H, is…
Descriptors: Science Instruction, College Science, Secondary School Science, Chemistry
Kitabayashi, Suguru; Nakano, Masayoshi; Nishikawa, Kazuyuki; Koga, Nobuyoshi – Journal of Chemical Education, 2016
A laboratory exercise for the education of students about thermal runaway reactions based on the reaction between aluminum and hydrochloric acid as a model reaction is proposed. In the introductory part of the exercise, the induction period and subsequent thermal runaway behavior are evaluated via a simple observation of hydrogen gas evolution and…
Descriptors: Science Instruction, Chemistry, Science Laboratories, Thermodynamics