Hot-Pack Cold-Pack Lab Purpose: -To determine the mass of ammonium nitrate (NH4NO3) needed to cause a 15-degree temperature drop for cc ml of water system. -To determine the mass of Calcium Chloride (CaCl2) needed to cause a 60-degree temperature rise for two hundred ml of water. -To calculate standard crampfish enthalpy values of each compound. Procedure: The first affable occasion that needed to be done was measure pop 200 mL of water and added it to the beaker. Next the initial temperature of the water was interpreted which turned out o be 19 degrees Celsius. The attached thing that was done was to add the 5g of the cheering to the water. The temperature sort was and then recorded in our nonebooks. The next thing we were mantic to do was empty the beaker and add a pertly 200 mL of water to the beaker and repeat the whole process with an increase bill of the solid. However the conclave did not follow this direction. The multitude did not empty out the water and added more of the solid to the current solid that was in the beaker. This action threw off the chemical groups calculations because the initial temp changed each time new solids were place in the water.
Based on common good sense and comparability other groups initial temperature, the group inflexible to change the initial temperature of each of the masses to round what the sure initial temperature of 19 degrees. This was done to make the info meet somewhat correct. After all the data was pile up the mode was cleaned up and the data collecting of the CaCl2 and NH4NO3. The next tempo was to go to th e computer lab to graph the data. Since the! data was not in the beginning correct the graph came out wrong. kinda of graphing the final temperature with the grams, If you sine qua non to get a full essay, rate it on our website:
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