The experiment intended to measure the freezing point depression, heat of dissolution, costs, and environmental impacts of calcium chloride when used a road deicer. Calcium chloride was determined to likely be an effective deicer as it has been widely sold for the purpose. It was thus hypothesized to have a high freezing point depression in deionized water and a high heat of dissolution as both are desirable characteristics of deicers. The reasons for its la...
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...eat of dissolution it was necessary to calculate the calorimetry constant of the Styrofoam cup and lid used as it was clearly not a perfect calorimeter. 60 mL of room temperature deionized water was measured and poured in two beakers. One of the beakers was then heated using a hotplate until just before it began to boil. The temperatures of both beakers were then recorded using the temperature probe and were then combined in a Styrofoam calorimeter. It was left to sit for 5 minutes and the equilibrium temperature was measured. 100 mL of deionized water was measured in a beaker and combined with two grams of calcium chloride in the calorimeter. The deionized water temperature was measured just before adding the calcium chloride and throughout the heating process. When the heating curve appeared to level off the temperature was measured as the equilibrium temperature.
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