A Research of Secondary School Chemistry Major Teachers Perceptions on the Drying Phenomenon of Frozen Wash

Journal of the Korean Chemical Society

Hyun-Hee Kim¹  Ki-Chang Yang¹  Seoung-Hey Paik¹  Dong Uk Kim¹ 

关键词: È­Çб³À°;    Secondary School;    Chemistry Major Teacher;    Teacher¡¯s Perception;    Sublimation;    Drying Phenomenon of Frozen Wash;    Phase Diagram;    Chemistry Education;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

This study identified secondary school chemistry major teachers' perceptions of sublimation related to the drying phenomenon of frozen wash and representation of the phenomenon on phase diagram. The subjects were 53 teachers for the questionnaire developed for this study, and interviews. The two professors who majored physical chemistry and one professor who majored analytical chemistry at teacher's college were interviewed for teacher educators' perceptions of sublimation. The results showed that forty one teachers among fifty three teachers thought that the drying phenomenon was sublimation. The most teachers who thought that the phenomenon was sublimation responded as a reason that solid state changes to gas state. The teachers who thought that the phenomenon was not sublimation responded as a reason that the 1 atm of air pressure was not the condition of sublimation. Seventeen teachers thought that the drying phenomenon of frozen wash could be represented on phase diagram, but thirty four teachers thought that it could not. But most teachers confused the scientific representation of the phenomenon, and felt difficulties to teach the contents to students.

【 授权许可】

Unknown