Calorimeter
A team was sent to the chemical manufacturing division of a small chemical company to help the technicians with experiments. Since the notes written by the technicians were inaccurate and unfinished, all of the experiments they had preformed needed to redone and documented correctly. The head of the company gave the new team the task of trying to figure out why some chemical reactions caused the reaction vessel to get cold and others caused the vessel to get hot. The group constructed °an apparatus to measure the quantity of thermal energy gained or lost during the chemical reactions± (Bellama, 193). This device was called a calorimeter. A series of different reactions were conducted using two different calorimeters. First, hot and cold water tests were preformed. Based on these results the scientists calculated the heat capacities of the calorimeter. The density and specific heat of pure water were used for these calculations. The other tests that were redone and rec!alculated were: salts in water, precipitation reactions, and acid base reactions. Then the question of whether the solution absorbed or gave off heat can be answered. Also, whether or not the concentration of an acid base reaction made a dif
4. A square piece of cardboard was cut to function as the lid For the initial temperature, our team used the temperature of the solution already in the calorimeter before we added the second. Our team always placed the acid in the calorimeter first before adding the base. (1M) HCl & (1M) NaOH -85.0 kJ/mol (1M) CH3COOH & (1M) NH4OH -48.4 kJ/mol ∆H in Trial 1 ∆H in Trial 2 ∆H in Trial 3 2 .053 kJ/æ .054 kJ/æ .054 kJ/æ 1 .03 kJ/æ .03 kJ/æ 0.03 kJ/æ 1. 50 mL of water were measured using a graduated cylinder and put into a calorimeter Sample Calculation for ∆H for a Salt in Water (Calorimeter One)
Some common words found in the essay are:
Base Reactions, Capacity Calorimeter, , Umland Bellama, Base Twenty, Reactions Ten, J/g According, Salts Water, SrSO4 BaSO4±, Construction Calorimeters, acid base, base reactions, acid base reactions, initial temperature, graduated cylinder, strong acid, heat capacity, strong acid base, measured graduated cylinder, precipitation reactions, measured graduated, barium chloride, recorded ten, weak acid base, graduated cylinder calorimeter,
Approximate Word count = 3198
Approximate Pages = 13 (250 words per page double spaced)
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