Mofu Lin Ms. Conte 15/3/12 IB Chemistry Soda can calorimeter(Energy content of food) Lab report Introduction We‚ human needs energy to live and for movements. Thus‚ we eat and combust food to release its heat energy in our bodies. In this experiment‚ we will determine how much heat energy released when we eat snack foods such as popcorn or potato chips. This lab includes three burning tests of different foods with different energy contents. Calorimetry is the science associated with determining the
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Determination In “The Glass Castle” we see many different possibilities pertaining to Maslow’s Hierarchy of Needs. We see the father‚ Rex and one of the daughters‚ Maureen‚ who fall victim to Maslow. Then there’s Jeanette and the mother‚ Rose Mary who have both seemed to achieve self-actualization regardless of their hardships. Traditionally‚ Maslow’s Hierarchy is thought to be achieved by working up from the bottom of the pyramid to get to the top. However‚ in “The Glass Castle” this is not particularly
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Fusion‚ J/g Heat of Vaporization‚ J/g Aluminum‚ Al 0.9025 395.01 10742.6 Benzene‚ C6H6 1.74 126.15 394.9 Brass 0.376 Carbon‚ C 0.710 Copper‚ Cu 0.385 204.82 5308.6 Ethyl alcohol‚ CH3CH2OH 2.4194 108.68 877.8 Glass 0.664 Gold 0.129 62.98 1647.5 Ice 2.090 333.56 2257.2 Iron 0.4598 266.27 7440.4 Lead 0.1296 24.66 944.68 Magnesium 1.0157 371.60 6061.0 Mercury 0.1379 11.286 284.24 Silver 0.235 Steam 2.015 333.56 2257.2 Tin 0.2274 Titanium‚ Ti 0.5226
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For all 3 weeks‚ the calorimeter oval bucket (#13) was filled up with roughly 2.000 kg of DI water. The temperature of the water was roughly around room temperature (depending how long it was sitting in the room). The bucket was then placed in the calorimeter in a certain way. At the bottom of the bucket‚ there were 3 “dents” which were aligned with the dents at the bottom of the calorimeter jacket (#14). The oxygen combustion bomb (#15) was then opened and
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experiment‚ you will measure the temperature change of two reactions‚ and use Hess’s law to determine the enthalpy change‚ ΔH of a third reaction. You will use a Styrofoam cup nested in a beaker as a calorimeter‚ as shown in Figure 1. For purposes of this experiment‚ you may assume that the heat loss to the calorimeter and the surrounding air is negligible. OBJECTIVES In this experiment‚ you will • Use Hess’s law to determine the enthalpy change of the reaction between aqueous ammonia and aqueous
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7/16/12 Heat of Fusion Heat of Fusion for Ice Introduction: This lab report is a step by step process in calculating the heat of fusion for ice and to compare the differences between salt added to room temperature water and salt added to icy water. To calculate heat of fusion‚ one must understand heat of fusion. Heat of fusion is the amount of heat required to convert a mass of a solid at its melting point into a liquid without an increase in temperature. As difficult as this may sound‚
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Determination has helped many well known brands and people become known . One of the most important keys to success is determination. There are many details‚ and aspects from texts‚ but there were three reasons that were evidenced from the articles The business of beanbags‚ Climbing Kilimanjaro‚ and The Mighty Macs that stood out. The first reason is that being motivated can benefit you in many ways. Motivation is a reason to do something‚ or take action. By being motivated‚ Lilian Wairimu Njue
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Introduction The primary objective of this lab is to be able to determine the specific heat of a reaction by using a calorimeter. A calorimeter is a device used to determine the specific heat of chemical reaction or a physical change. The specific heat a reactions is used to refer to the amount of heat that is lost or gained when one gram of a particular substance increases or decreases by one degree Celsius. When a chemical reaction occurs in an open container most of the energy gained or lost
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Ice Ages and Climate Change Scientists believe that over the past 2.8 billion years‚ immense layers of ice have covered the Earth. The ice age proposes a puzzle composed of the works and findings of dozens of scientists through history‚ each providing a crucial piece to the puzzle. Scientists who worked on the development of this puzzle ranged from Geologists‚ Astronomers‚ Physicists‚ and early Biologists whom ultimately proved the complexity of this expanding subject. Progressing from a hypothesis
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SCH4U UNIT 3: Thermochemistry Assignment May 2‚ 2011 1. Upon the addition of potassium nitrate to liquid water‚ the beaker feels cold. Explain‚ using appropriate terms: system‚ surroundings‚ heat‚ temperature‚ endothermic or exothermic. The endothermic process whereby the system of KNO3 crystals dissolving in the water absorb energy from the surroundings and the measured temperature of the surroundings (beaker‚ air) drops. 2. The phase change from
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