Experiment 22

22 Experiment Dystan Medical Supply Company: heatless Packs & Hot Packs A Self-Directed Experiment March 20, 2009 1

Introduction

The use of hot and shabby charters are wide used around the world are serve as a great relief for short-term pain. Many plurality are aware of its extensive uses for athletes or even for melting up on a chilly day. These packs are do from a bag that is comprised of two separate sections, the first matchless is made up of a salt and the other cardinal contains water. When someone breaks the bag, the salt (solute) go forth dissolve in the water (solvent), thus creating either an endothermic or exothermic reception which ultimately depends on the concentration of salt. Both of these types of chemical reactions can seduce either a hot or a raw pack, depending on whether heat is absorbed or released. An endothermic reaction is known to generate a cold pack because the heat and energy are absorbed from the environment 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 different salts in rear to see which ones will work the best for producing these hot and cold packs. These salts are ammonium nitrate, calcium chloride, lithium 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 it will cost to actually produce them for the Dystan Medical Supply Company. In order to do this, we must find a expression to determine the mass of each individual necessary 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: Orderessay



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