Experiment 22 - Hot packs and cold packs are primarily used...

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Hot packs and cold packs are primarily used to treat injuries. In these packs, there are either endothermic processes or exothermic processes that occur which make the packs either cold or hot. Endothermic processes entail heat being absorbed while exothermic processes entail giving off heat to reduce pain and increase blood flow. The enthalpy of solution is the enthalpy change associated with the dissolution of a substance, in this case a salt, in a solvent at constant pressure. The composition of hot or cold packs consist of water and salt. Thus, the enthalpy changes of dissolution will determine whether a particular salt is appropriate as a hot or cold pack ingredient. Our job is to find which salt (ammonium nitrate, calcium chloride, lithium chloride, and potassium chloride) would be the most effective for producing either hot packs or cold packs. To do this, our team is using Experiment 19: Thermal Energy Associated with Physical and Chemical Changes to determine the ideal salt for production and the unit cost of production per cold pack and hot
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This note was uploaded on 09/20/2009 for the course CHEM 344 taught by Professor Denniston during the Spring '09 term at University of Georgia Athens.

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Experiment 22 - Hot packs and cold packs are primarily used...

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