Developing a Model to Explain Colligative Properties Using Entropy: Changes in Chemistry Teachers’ Perceptions of Crosscutting Concepts 


Vol. 69,  No. 3, pp. 111-126, Jun.  2025
10.5012/jkcs.2025.69.3.111


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  Abstract

This study aimed to help chemistry teachers recognize the importance of the concept of entropy in explaining colligative properties of dilute solutions and to develop models that enable an integrated understanding of colligative properties from the perspectives of ‘Patterns’ and ‘Cause and effect,’ which are sub-elements of the ‘Crosscutting Concepts.’ To achieve this, an advanced organizer teaching model was employed in an educational program conducted overeight sessions. The participants were 23 in-service chemistry teachers, and their perception changes were analyzed through pre- and post-interviews. The results showed that, in the pre-interviews, only 3 out of 23 teachers recognized the necessity of entropy, but this number increased to 18 in the post-interviews. Additionally, the models developed through modeling activities involving the concept of entropy were categorized into two types: those recognizing the ignorance of the enthalpy concept and those not recognizing such ignorance. An analysis of the teachers’ perception changes and the types of models developed revealed that the advanced organizer teaching model effectively promoted the recognition of the importance of entropy and fostered integrated thinking using the ‘Crosscutting Concepts.’ Consequently, teachers were able to develop models from the perspective of ‘Crosscutting Concepts’ and enhance their ability to guide students in understanding colligative properties of dilute solutions. However, some teachers continued to adhere to the particulate-level explanatory approach due to the conceptual complexity of entropy and their familiarity with the presentation style of existing textbooks. To address this issue, additional modeling experiences and concrete case-based teacher education programs need to be developed.

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  Cite this article

[IEEE Style]

J. Park and S. Paik, "Developing a Model to Explain Colligative Properties Using Entropy: Changes in Chemistry Teachers’ Perceptions of Crosscutting Concepts," Journal of the Korean Chemical Society, vol. 69, no. 3, pp. 111-126, 2025. DOI: 10.5012/jkcs.2025.69.3.111.

[ACM Style]

Juhye Park and Seoung-Hey Paik. 2025. Developing a Model to Explain Colligative Properties Using Entropy: Changes in Chemistry Teachers’ Perceptions of Crosscutting Concepts. Journal of the Korean Chemical Society, 69, 3, (2025), 111-126. DOI: 10.5012/jkcs.2025.69.3.111.

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