necessary to produce a temperature change of 1°C per gram of substance. The specific heats of different substances vary‚ and therefore this quantity may be useful in identifying an unknown. The measurement of heat changes is called calorimetry. In this lab activity‚ calorimetry will be used to determine the specific heat of an unknown metal. This will be done by using a styrofoam cup calorimeter containing water. A calorimeter is insulated so as to minimize any loss of energy to the surroundings. Therefore
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Calorimetry labs are frequently performed in order to determine the heat of reaction or the heat of fusion or the heat of dissolution or even the specific heat capacity of a metal. The calorimeter is a device used to measure the quantity of heat transferred
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system and surroundings. 2. Distinguish between heat energy and temperature. Name the SI units of temperature and thermal energy. 3. Calculate the heat content (thermal energy) of a substance using its specific heat‚ temperature and mass. 4. Solve calorimetry problems. 5. Name the energy associated with a change of state and calculate the energy required to change a given mass of substance from solid to liquid or liquid to gas. 6. Describe the changes in the microscopic structure of a substance during
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Thermodynamics- Enthalpy of Reaction and Hess’s Law Objectives: 1. To calculate the heat of reaction of a given reaction using the concepts derived from Hess’s Law. Pre-lab Questions: 1. Define Heat of Reaction. The enthalpy change associated with the completion of a chemical reaction. 2. Define Specific Heat. The energy it takes to raise the temperature of 1 gram of a substance by one degree Celsius. 3. Calculate the heat of reaction assuming no heat is lost to the calorimeter. Use correct
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400 rpm for 12 hours‚ unbound MT was removed by centrifugation and washing‚ resulting in the formation of PDA@MT. Evaluation of encapsulation efficiency and loading capacity Encapsulation efficiency and loading capacity were determined using the differential method. 5 mg of MT standard substance was weighed and dissolved in ultra-pure water to prepare the standard curve. The resulting solution was transferred to a 5 mL volumetric flask to prepare a 1 mg/mL DEX solution‚ which was then further diluted
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ANALYTICAL BIOCHEMISTRY Analytical Biochemistry 363 (2007) 1–11 www.elsevier.com/locate/yabio Review Ultrasensitive biochemical sensors based on microcantilevers of atomic force microscope Chengyin Wang b a‚b ‚ Deyan Wang a‚ Yindao Mao a‚ Xiaoya Hu a‚b‚* a College of Chemistry and Chemical Engineering‚ Yangzhou University‚ Yangzhou 225002‚ China Key Laboratory of Environmental Engineering and Monitoring of Jiangsu Province‚ Yangzhou‚ China Available online 4 January 2007
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(Lewis and Drife 2004).Furthermore‚ it is still the most common cause of maternal death in the 1st trimester of pregnancy (Condous G 2006) affecting 1:100 pregnancies (Ectopic Pregnancy Trust 2007).For this case study I will discuss the essence of scanning women who present in EPU’s with a positive pregnancy test and any symptoms of a possible ectopic pregnancy. CASE REPORT This is the case of 32yrs old primigravida referred to an early pregnancy unit by her GP with a history of irregular menstrual
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SYLLABUS – ADVANCED PLACEMENT CHEMISTRY Required Texts 1. Chemistry: The Central Science by Brown‚ LeMay and Bursten‚ 10th ed.‚ Pearson Education. Inc.‚ Upper Saddle River‚ NJ‚ 2006‚ ISBN: 0131464892 Includes: Text book‚ Laboratory Manual‚ Student Study Guide‚ AP Test Prep Series‚ Solutions to Practice Problems 2. Barrons AP Chemistry‚ Jespersen‚ Neil D‚ 4th ed.‚ Barron’s Educational Series‚ Inc‚ 250 Wireless Boulevard‚ Hauppauge‚ New York 11788
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Types of Energy: Energy is the ability to do work and there are many types of energy. Mechanical Energy is the energy of motion that does the work like the wind turns a windmill. In physics‚ mechanical energy is the sum of potential energy and kinetic energy present in the components of a mechanical system. It is the energy associated with the motion and position of an object. The law of conservation of energy states that in an isolated system that is only subject to conservative forces‚ like
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Chemistry/7 3 March 2012 Calorimetry Lab report Cheeto calorie counting The purpose of this experiment is to use calorimetry to determine the number of calories in a Cheeto and compare that to the advertised caloric value using percent error. Introduction The amount of heat needed to increase the temperature of an object exactly 1°C is the heat capacity of that object. The specific heat capacity of a substance is then the amount of heat it takes to raise the temperature of 1g of the substance1°C
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