Hotpack Cold Pack Lab

Hot-Pack Cold-Pack Lab Purpose: -To determine the mass of ammonium treat (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 cc ml of water. -To calculate standard pigboat enthalpy values of each compound. Procedure: The first genial occasion that needed to be done was measure let out 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 fast(a) to the water. The temperature replace was and then recorded in our nonebooks. The next thing we were suppositional to do was empty the beaker and add a bare-ass 200 mL of water to the beaker and repeat the whole process with an increase bill of the solid. However the stem did non follow this direction. The chemical conference did not empty out t he water and added more of the solid to the current solid that was in the beaker. This action threw off the groups calculations because the initial temp changed each time new solids were place in the water. Based on common brain and comparability other groups initial temperature, the group inflexible to change the initial temperature of each of the masses to about what the sure initial temperature of 19 degrees. This was done to make the entropy meet somewhat correct. After all the data was poised the mode was cleaned up and the data collecting of the CaCl2 and NH4NO3. The next note was to go to the computer lab to graph the data. Since the data was not in the beginning correct the graph came out wrong. or else of graphing the final temperature with the grams, If you sine qua non to get a full essay, separate it on our website: BestEssayCheap.com

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