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http://dx.doi.org/10.14697/jkase.2006.26.7.805

Conception Analysis of Students, Pre-service Teachers and Chemistry Teachers on Boiling Point Elevation  

Yoon, Hee-Sook (Seoul National University)
Jeong, Dae-Hong (Seoul National University)
Publication Information
Journal of The Korean Association For Science Education / v.26, no.7, 2006 , pp. 805-812 More about this Journal
Abstract
In this study the description patterns of chemistry textbooks on the boiling point elevation phenomenon and the understanding patterns of high school students, pre-service teachers and chemistry teachers were investigated. High school chemistry II textbooks developed in the 6th and 7th national curricula were analyzed and the conception patterns of subjects on this phenomenon were categorized using a questionnaire developed for this study. The description patterns of science textbooks were classified into three: 'decreasing of surface solvent molecules', 'attraction force between solvent and solute molecules' and 'decreasing of surface solvent molecules and attraction force between solvent and solute molecules'. In the result of the conception analysis, the ratio of 'attraction force between solvent and solute molecules' was high among students, pre-service teachers, and chemistry teachers. There was a propensity that they would like to explain the boiling point elevation in terms of enthalpy rather than entropy, and in order to analyze this propensity, follow-up interviews were carried out.
Keywords
boiling point elevation; science textbook; entropy; enthalpy; attraction force; solvent molecules on surface;
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