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Experiment 2

# Experiment 2 - ABSTRACT The experiment entitled “Heat and...

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Unformatted text preview: ABSTRACT The experiment entitled “Heat and Calorimetry” aimed to determine the specific heat of some metals, and determine the latent heat of fusion of ice. The students prepared the materials given and preceded to the experiment proper. The experiment made use of a calorimeter, two different metals and ice . The first metal is aluminum and the other is brass. The experiment is started with a preheating of water to boiling to save time. Afterwards, the experiment proceeded in determination of the specific heat of some metals, and followed by the determination of the latent heat of fusion of ice. The specific heat of aluminum and brass were computed, as well as, the percentage error and the latent heat of fusion of ice. The result yielded a value of specific heat of 0.1944 cal/g-C° for aluminum having 10.58% error and 0.0786 for brass having 14.28% error. Results also revealed that the ice has a latent heat of fusion of 75.3722 cal/g with 5.78% error. In addition, the initial temperature of the metal was assumed to be 100°C since it is in contact with boiling water. Moreover, the hypotheses are both rejected due to sources of errors and non- ideal condition of experiment. INTRODUCTION When a material is contacted with a surface the material also is heated, however when a material is contacted with a cold surface the cold surface becomes warmer. This is because of the energy transfer from the warmer substance to a colder neighboring body. This transfer of energy because of temperature differences is called heat. Heat is quantified using different units like calories (cal), joules (J), and the infamous British thermal unit (Btu). The heat that flowed from one material to another is measured using a device called calorimeter. The walls of calorimeter are insulated with air so that no heat exchange with the surrounding. When a substance absorbs or gives off heat, the substance may have an increase or decrease in internal energy, and this sudden change may cause a change of phase or phase transition, such as, from solid to liquid, liquid to gas, and many more. The heat required per unit mass during a melting process is called the latent heat of fusion. On the other hand, for the evaporation process it is called the latent heat of vaporization. Different substances have different capacities to store internal energies, thus, it also requires different amounts of heat to raise its temperature. This quantity of heat required to raise the temperature of a unit mass of a material to 1 Celsius degree is called the specific heat capacity of the substance. This experiment sought to determine the specific heat of some metals, and determine the latent heat of fusion of ice....
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Experiment 2 - ABSTRACT The experiment entitled “Heat and...

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