Experiment 22

22 Experiment Dystan Medical tot Company: mothy Packs & Hot Packs A Self-Directed Experiment March 20, 2009 1 Introduction The use of hot and shabby charters ar extensive used around the world are serve as a great relief for short-term pain. Many ingroup are aware of its extensive uses for athletes or even for melt down up on a chilly day. These backpacks are do from a bag that is comprised of two separate sections, the first unmatched is made up of a saltiness and the other firebird contains water. When someone breaks the bag, the salt (solute) go forth dissolve in the water (solvent), thus creating either an endothermic or exothermal reception which ultimately depends on the concentration of salt. Both of these types of chemic reactions quarter seduce either a hot or a raw pack, depending on whether foment is absorbed or released. An endothermic reaction is known to generate a cold pack because the heat and energy are absorbed from the surround while an exothermic reaction is known to produce a hot pack as a result of heat and energy universe released to the atmosphere. This experiment is comprised of testing four divers(prenominal) salts in rear to see which ones ordain work the vanquish for producing these hot and cold packs. These salts are ammonium nitrate, calcium chloride, atomic number 3 chloride, and potassium chloride.

non only will we determine which one is the most capable for creating these packs, but we will also consider how much(prenominal) it will cost to actually produce them for the Dystan Medical Supply Company. In order to d o this, we must find a expression to determ! ine the mass of each individual indispensable in the production of a 100-mL cold pack that can come over a temperature of 0C and a 100-mL hot pack that can attain a temperature of 65C. To carry out our experiment, we will construct a calorimeter and record numerous thermograms using the MeasureNet station. In return, we will be able to tell from our calculations if the salt reactions are either endothermic or exothermic, thus revealing which salt is...If you want to exhaust a full essay, order it on our website: OrderCustomPaper.com

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