How Hot is That Flame - How Hot is That Flame? Greg...

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How Hot is That Flame? Greg Reynolds, Lab Partner: Jonathan Chan, Experiment 6 completed on 10/30/07 Purpose: The purpose of this lab was to use calorimetry and a series of experiments to determine the heat of burning magnesium metal using Hess’s law and data from two reactions of magnesium based substances and HCl. Method: First the calorimeter was weighed to 93.04g and filled with water to the weight 204.14g and the temperature of this water was taken every 30 seconds for 3 minutes until it stabilized at 23 ° C. An ice bath was then prepared and its temperature was taken every 30 seconds for 7 minutes until it stabilized at 1 ° C. Some of this cold water was then added to the calorimeter and the top was placed on it and the temperature of the mix was recorded every 30 seconds for 2 minutes until it stabilized at 17 ° C. The calorimeter was then re-weighed in order to determine the amount of cold water added (54.4 g). A dilution of 5.0M HCl to 1.0M HCl was then prepared in a 100 mL graduated cylinder using 20mL of acid and 80mL of water and this solution was poured into the calorimeter and weighed (194.03g). The temperature of the HCl was observed at 30-second intervals for 2 minutes until it stabilized at 22 ° C. Next 0.2538g of magnesium metal was added to the calorimeter system and the temperature was observed for 2 minutes until it reached a peak of 32 ° C. After rinsing the calorimeter another dilution of HCl was prepared using the same methods as before and its weight (with the calorimeter) was 193.68g with stabilized temperature of 22.5 ° C. Then 0.88g of MgO was added to the HCl and its temperature was observed for 3.5
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minutes and reached stabilization at 29.75 ° C. A series of calculations was then employed to discover the heat released by the burning
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This note was uploaded on 09/07/2009 for the course BIO 1B taught by Professor Carlson,mischel,power during the Spring '07 term at University of California, Berkeley.

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How Hot is That Flame - How Hot is That Flame? Greg...

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