LEARNING OBJECTIVES:
1) What type of materials produce electrolytes (ionic compounds/bonds or molecules/covalent bonds) and under what circumstances?
2) Explain how a cold pack works (using terms such as endo/exothermic, seed crystal).
Flinn Scientific has FREE LABS for students to interact with.
Read ChemMatters Feb. 1987
Homework:
href="http://www.teachnlearnchem.com/Solutions/PDF/870207s.pdf" target="_blank">Hot and Cold Packs article and answer questions