Experiments In General Chemistry 22

Purpose:
Establish which salt solution would prove to be the more or less price effective for the society to produce red- overheated and cold packs that reach temperatures of 65° C and 0° C, respectively, as well as their relevant prices of production.
Introduction:
The Dystan Medical supply Company is searching for a salt solution for their hot and cold packs that will be most 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 by small quantities until the reaction reaches

When ionic compounds dissolve in water, they either 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 enthalpy of waste is the enthalpy flip-flop associated with the dissolution of a substance in a solvent at a constant pressure. 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, measured in joules per gram per degree Celsius
M is the mass of the solution, measured in grams
J is the joules
G is the grams 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 initialize 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: Orderessay



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