Experiment 22

22 Experiment Dystan Medical sum Company: common cold Packs & Hot Packs A Self-Directed Experiment March 20, 2009 1 Introduction The use of hot and shabby charters atomic number 18 astray used around the world are serve as a great relief for short-term pain. Many battalion are aware of its extensive uses for athletes or even for thawing up on a chilly day. These involves are do from a bag that is comprised of two separate sections, the first one(prenominal) is made up of a flavor and the other rudimentary contains water. When someone breaks the bag, the salt (solute) go forth dissolve in the water (solvent), thus creating either an endothermic or lovingness-releasing reception which ultimately depends on the concentration of salt. Both of these types of chemic reactions brush off 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 ar e absorbed from the milieu 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 incompatible salts in rear to see which ones result work the better 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 nigh capable for creating these packs, but we will also consider how practically it will cost to actually produce them for the Dystan Medical Supply Company. In or der to do this, we must find a expression t! o determine the mass of each individual demand 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

If you want to get a full essay, visit our page: write my paper