Day 63 – Would you put your hand in iron as it freezes? #chemchat #modchem #180blog

As I continue to help students conceptualize heat, the misconceptions have been very resilient. Student still have two major stumbling points. First if you heat something the temperature rises, even when they’ve collected data to the contrary. Second, they still relate every experience of phase changes to water. This means freezing is cold and boiling is hot. This gives them two problems. They both struggle with the idea that something gives off heat when freezing and they struggle to understand how freezing iron burns and boiling nitrogen chills.

I don’t yet have the answer, but this is the first time my students have really confronted these ideas. In the past, we just memorized and moved on. Next we’ll look at some freezing magma. Muhahahaha……

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