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Calorimeter Lab

# Calorimeter Lab - Calorimeter Lab EMA3012C Lab Time Friday...

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Calorimeter Lab EMA3012C April 18, 2008 Lab Time: Friday 1:30 p.m. Jean-Claude Le

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Abstract The process of using a professional calorimeter was demonstrated and the applications were observed. The test yielded results and the data was plotted on a graph. The values of heat flow of a particular sample were calculated as a function of temperature in Celsius. By performing a calorimeter test, the amount of heat needed to force a sample to reach a certain temperature was found. The calorimeter can also be used to determine the heat capacity of a sample. Introduction A calorimeter is a device used for calorimetry, the science of measuring the heat of chemical reactions or physical changes as well as heat capacity. The word calorimeter is derived from the Latin word calor, meaning heat. Differential scanning calorimeters, isothermal microcalorimeters, titration calorimeters and accelerated rate calorimeters are among the most common types. A simple calorimeter just consists of a thermometer attached to an insulated container. To find the enthalpy change per mole of a substance X in a reaction between two liquids X and Y, they are added to the calorimeter and the initial and final (after the reaction has finished) temperatures are noted. Multiplying the temperature change by the mass and specific heat capacities of the liquids gives a value for the energy given off during the reaction (assuming the reaction was exothermic.). Dividing the energy change by how many moles of X were present gives its enthalpy change of reaction. This method is used primarily in academic teaching as it describes the theory of calorimetry. It doesn’t however account for the heat loss through the container or the heat capacity of the thermometer and container itself. In addition, the object placed inside the calorimeter show that the objects transferred their heat to the calorimeter and
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Calorimeter Lab - Calorimeter Lab EMA3012C Lab Time Friday...

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