Lab 1- Hot and coldpacks - Hot- and Coldpacks February 11,...

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Hot- and Coldpacks February 11, 2008 1
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Results and Discussion: A hot pack undergoing a 3 oC at optimal efficiency and minimal cost was designed in this lab. Each group was assigned a salt and the materials necessary to create the pack. First, the heat capacity (C) of the Styrofoam calorimeter was determined. Then, using the calibrated apparatus, the heat of solution for the given salt (NH 4 Cl) was calculated. In the following week, the lab’s results for each of the salts with a negative heat of solution were used to construct the most affordable hot pack. The process used it detailed below. Three experimental trials were performed to calculate the average heat capacity of the calorimeter. The mass of the hot and cold water was obtained by differencing the mass of an empty 100ml beaker and the beaker filled with 50ml of water; these data are omitted from the table. The data was tabulated in Table 1. Table 1: Heat Capacity of Water (H
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This note was uploaded on 05/15/2008 for the course CHEM 342132 taught by Professor Davis during the Spring '08 term at Cornell University (Engineering School).

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Lab 1- Hot and coldpacks - Hot- and Coldpacks February 11,...

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