Lab Report Exp9

Lab Report Exp9 - Ryan Cohen 1/14/09 Thermo-chemistry The...

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Ryan Cohen 1/14/09 Thermo-chemistry The purpose of this lab was to explore the dynamics of Thermo-chemistry and its applications to heat transfer and heat capacity. Part 1 used the principles of heat transfer in order to calculate the heat capacity of the calorimeter that would be used in further experimentation. Part 2, similarly, found the heat capacity of an unknown metal, using the calculated heat capacity of the calorimeter in part 1. Parts 3 and 4 focused on finding the heat of a reaction. Part 3 mixed Ammonium Nitrate in the colorimeter and determined the change in enthalpy, H, of the resulting solution. Similarly, Part 4 mixed strong acid and strong base, in order to find the H of a neutralization reaction. Part 1 of the lab determined the heat capacity of the calorimeter by applying simple principles of Thermo-chemistry and heat transfer. Using a Styrofoam cup as the calorimeter, cold and hot water were mixed, with the temperature being recorded at constant intervals. The data was then plotted and the plot was used to extrapolate the change in temperature from hot to cold. Using this information, and knowing from which substances heat was transferred to and from, the heat capacity, C cal , of the calorimeter was determined. C cal represents the amount of heat the calorimeter can absorb, before it raises its temperature by 1K. C
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Lab Report Exp9 - Ryan Cohen 1/14/09 Thermo-chemistry The...

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