This is a shorter version of a previously published Learning Object. This version focuses on bond enthalpy calculations and has students think about the risks and safety precautions for the synthesis of an explosive material (nitrogen triiodide).
There is also a longer version of this activity posted as a literature dicussion.
The activity itself requires nothing more than a table of bond enthalpies and access to a laboratory handout and journal publication.
We discuss the simplest questions together after completion, noting the common pitfalls. I collect the students' work to see their individual perspectives on lab safety. They will see some content from the activity later on an exam.