Experiments In General Chemistry 22

Purpose: Establish which common salt dis resolving power would prove to be the more or less price stiff for the lodge to piddle red- over estrused and cold packs that reach temperatures of 65° C and 0° C, respectively, as well as their relevant prices of production. groundwork: The Dystan Medical supply Company is searching for a salt solution for their hot and cold packs that bequeath be most(prenominal) cost effective. The cost of production per pack must be less than $5.00 for the company to make a profit. Four salts: ammonium nitrate, calcium chloride, atomic number 3 chloride, and potassium chloride will be tested to find to most cost effective solution. The salts will be faded in distilled body of water by small quantities until the reaction reaches When ionic compounds dissolve in water, they both absorb energy from or sackful energy to the surroundings. If a chemical reaction absorbs heat from the surroundings, it is an heat-absorbing reaction. If a solution releases heat to its surroundings, it is an exothermic reaction. The heat content of waste is the enthalpy swap associated with the dissolution of a substance in a solvent at a constant crowdure. The change in enthalpy relies on the concentration of the salt solution, because antithetic concentrations will produce different enthalpies. There is an equation to jell how much of this heat energy is lost or gained when a reaction is performed.

Q = c m (T1-T2) Where: q is the energy in Joules C is the heat capacity, metrical in joules per gram per degree Celsius M is the mass of the solution, deli berate in grams J is the joules G is the g! rams of water T is the temperature ?H=?E + P?V = (q p +w) w = q p procedure: 1. Follow instructions 1-9 in Appendix A-1 to arrange the MeasureNet workstation. a. unloosen on the MeasureNet workstation. b. commove Main Menu, so press F2 Temperature, then F1 Temperature vs. Time. c. Fill a 150-mL beaker halfway profuse with water and ice. Press Calibrate to calibrate the temperature...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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