# Calorimeter

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equation, one that describes the molar enthalpy of dehydration. Calorimetry is using a tool, the calorimeter, which insulates the system from the environment. This allows for the changes of temperature to be observed with minimal heat loss to the environment. Calorimetry allows for the heat of the solution to be calculated since the heat capacity of the calorimeter is known and the change in temperature is observed. The heat capacity is the ability for the container to retain the heat the is produced or absorbed without allowing for the outside environment to impact the reaction. This closed system allows for easy calculations where q_rxn+q_water+q_calorimeter=0. This is important to the lab that the total heat lost and gained must all equal zero. It would be hard to calculate how much heat was lost in the world by the experiment, so isolating the system to the calorimeter allows for the…

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The designed calorimeter and experiment was roughly 9.55 times more efficient than the control experiment. The designed calorimeter was also 48.99% closer to the accepted value (value obtained by industrial calorimeter accepted in industry). This is a huge improvement for how inexpensive and easy the calorimeter was to design and build, showing how inefficient the original experiment was. The calorimeter was designed based on the fact that heat permeates out of the flame in all directions and…

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Introduction The purpose of this lab is to find the most efficient way to capture energy from a combusted chip using a calorimeter. We made a basic calorimeter by using a steel can. Through out our lab we made modifications to the calorimeter to increase the percent of energy captured by the water. Literature Review Kinetic energy is the energy of motion. The kinetic energy of an object is energy that is being used. Potential energy is stored energy that it is not in motion, but has…

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a baked lay and through our calorimeter heat energy was pushed out. Then we took it another step further by modifying our calorimeter to capture even more energy. The overall purpose was to capture as much energy as possible. “Energy is the ability to do work, or the ability to elicit change in matter.” (Castro) Energy can be defined in different ways as well. Kinetic energy is energy that results from movement. (Castro) An example would be water flowing through a hydro dam. (What is…)…

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This experiment’s aim was to find the alcohol with the highest energy output when burnt using specific heat capacity of calorimeters. This data gathered only partially supported the hypotheses stated. There is an apparent trend between the heat energy of the alcohols and the amount of carbon atoms in the alcohols in the graphs shown. The first experiment (first graph) shows the results of the tests with a controlled calorimeter height of 20 centimeters. This means that the calorimeter, rather…

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In part one the Styrofoam cups and the substances that are in the cup which is distilled water and sodium hydroxide was the system while the stir rod and thermometer and the Vernier unit is the surroundings. In part two the Styrofoam calorimeter, HCl and NaOH are the system while the stir bar and the tool that is used to measure the temperature is the surroundings. In part 3 HCl, Styrofoam cup calorimeter and NaOH are the system while the temperature probe, stirring rod are the soundings 6.)…

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1. Heat water in a pan or beaker until it is boiling vigorously. 2. Measure the mass of the metal with the scale. 3. Drop metal into boiling water, and let it sit for for about five minutes. 4. Place the two styrofoam cups inside each other. 5. Measure the mass of the calorimeter, and then fill it ¾ full of room temperature water. Measure the mass again, and determine the water’s mass by subtracting the mass of the calorimeter from the total. 6. Calibrate thermometer as in experiment 2.1, then…

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ABSTRACT Within this experiment, the use of a bomb calorimeter was required in order to determine the heat capacity of the system through the combustion of three separate trials of benzoic acid. The resulting heat capacity values for each trial were averaged, with a standard deviation found as well. This was then used to work backwards, for a naphthalene trial, in order to calculate the change in energy (∆U) and the change of enthalpy (∆H). The accepted value for the change in enthalpy of…

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A calorimeter is a device used to measure heat of reaction. It can be sophisticated and expensive or simple and cheap. Bomb calorimeters are a more advanced way to more efficiently measure the heat released by combustion reactions. A bomb calorimeter is a sealed vessel that contains a smaller container called a "bomb." The bomb is a container designed to withstand high pressure, and is equipped with valves for adding gases and electrical contacts for initiating combustion reactions (Learner.org,…

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Magnesium Chloride as a Deicer Emily Lekah Fall 2015 CHEM 1066 October 15, 2015 University of Minnesota Abstract The purpose of this experiment was to evaluate magnesium chloride as a deicer. To be a good deicer, a salt must be able to lower the enthalpy when is mixed with water. This will cause an exothermic reaction and release heat. This experiment had three tests performed within it, The freezing point depression, the enthalpy of dissolution, and finding…

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