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The Man The Myth Essay

426 words - 2 pages

Richard KazmiMr.HickeyChemistry3/19/13Calorimetry Lab ReportPurpose: Calorimetry is the measurement of the heat flow into or out of a system for chemical and physical purposes. The purpose of this lab was to use calorimetry to find how much heat is absorbed or released when NaCl is dissolved in water. In this case, we will find the heat coming out of the system, in a chemical process.Hypothesis: Once the ...view middle of the document...

Fill up a beaker with 25ml water2. Pour water into Calorimeter (we had 35 ml)3. Put in 2 grams of NaCl4. Close the top5. Put in Thermometer6. Record starting temperature7. Use the stirrer to help stir the water and mix it with the sodium chloride8. Wait until the temperature stops increasing and record the final temperatureData:When the sodium chloride was added to the water, the water started to heat up. We could see mist hit the top of the container, as the gas was released. The initial temperature was 23 degrees Celsius, and then the final temperature was 41 degrees Celsius.2 grams of NaClC=4.184 degrees Celsius.Delta T= 18M= 35 mlStarting Temp: 23 degrees CelsiusFinal Temp: 41 degrees Celsiusq=(35)(4.184)(18) = 2,636 Jq= -2,636 J releasedConclusion: My hypothesis was correct. The water did in fact drastically rise as the sodium chloride was dissolving in the water. As a result, -2,636 Joules of heat was released from the chemical reaction with water and NaCl. The reaction was an Exothermic Process, because heat was released into the surroundings. The system in this reaction was the NaCl dissolving, and the surrounding being the water.

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