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Classification of Chemical Reactions 1 Classification of Chemical Reactions: the Effect of Expertise
| Content Provider | Semantic Scholar |
|---|---|
| Abstract | We explored the patterns of reasoning of undergraduate and graduate chemistry students when engaged in classification tasks involving microscopic (particulate) and symbolic representations of different chemical reactions. We were specifically interested in characterizing the basic features to which students pay attention when classifying chemical reactions at the symbolic and microscopic levels, identifying the categories that students create when classifying chemical reactions, and comparing the performance in simple classification tasks of students with different levels of preparation in the discipline. In general, we found that the level of expertise and the type of chemical representation influenced the number and types of categories created, the nature of the features used to build a class, and the role that these features played during the classification process. A large proportion of undergraduate students, regardless of their level of preparation in chemistry, based their classification schemes on the identification of surface features and failed to create chemically meaningful classes. Most graduate students demonstrated expertise in the classification of chemical reactions based on the chemical properties of the participating species. Although both undergraduate and graduate students expressed similar levels of unfamiliarity with the microscopic images of chemical reactions, advanced students were more inclined and adept to use the available representational features to build chemical meaning. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cbc.arizona.edu/tpp/ChemicalReactions.pdf |
| Alternate Webpage(s) | http://www.chem.arizona.edu/tpp/ChemicalReactions.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
