Experiments In General Chemistry 22

Purpose: Establish which table salt etymon would prove to be the more or less price efficacious for the orderliness to take on red- over combusted and cold packs that reach temperatures of 65° C and 0° C, respectively, as well as their relevant prices of production. substructure: The Dystan Medical supply Company is searching for a salt solution for their hot and cold packs that leave 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 water system by small quantities until the reaction reaches When ionic compounds dissolve in water, they all 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 sol ution releases heat to its surroundings, it is an exothermic reaction. The atomic number 1 of waste is the enthalpy tack on associated with the dissolution of a substance in a resultant at a constant messure. 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, heedful in joules per gram per degree Celsius M is the mass of the solution, c areful 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 set 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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