Calorimetry: Enthalpy of Neutralization Introduction: The purpose of this lab experiment was to determine the molar concentration of the unknown HCl by using a coffee cup calorimeter. A coffee cup calorimeter is made of Styrofoam cups with a thermometer that is placed from the top and into the calorimeter to measure the temperature as the reaction happens. The Styrofoam cup used for the calorimeter creates an isolated system as it acts as a heat insulator between the cup and the surrounding
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Data collection and processing Qualitative observation Before * Blue solution of copper sulfate * Grey zinc powder During * Blue color solution changes to greyish black * Heat is given out‚ so the surroundings become hotter. After * Grey powder remains on the sides of the cup * Precipitate formed at the bottom of the cup List of chemicals and apparatus used Chemicals used Copper sulfate solution‚ 1 mol dm-3 25g of zinc powder Apparatus needed
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It is better to prevent waste than to treat or clean up waste after it has been created. Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible‚ synthetic methods should be conducted at ambient temperature and pressure. Chemist Vilas Pol came up with an environmentally green method that breaks down plastics and transforms them into a highly usable substance for society. Chemist Vilas Pol inserted plastic bags
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Maria Reyes iLab‚ Week #4 CHARLES’ LAW Introduction The purpose of this lab was to determine the effect of temperature on the volume of gas when the pressure is consistent and to verify Charles’ Law. The data from the experiment reveals that as temperature increases‚ so does volume. This also indicates that as temperature decreases‚ the volume decreases as well. Procedure 1) Select a 60 mL Syringe Sealed from the Gas Syringe item under the Equipment menu. Set the volume to 20 mL in the Initial
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Introduction In thermo-fluid sciences‚ the measurement of temperature plays a key role. During this lab we tested two different types of thermocouples‚ a T-type and a J-type. Measuring with a thermocouple allows us to measure the temperature difference between two junctions. There are several laws that deal with the thermocouples and reading of temperatures. We use the first law of thermodynamics which states that there is a conservation of energy. Also the law of homogenous metals is in
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Checkup: Linear Functions Answer the following questions using what you’ve learned from this lesson. Write your responses in the space provided‚ and turn the assignment in to your instructor. 1. What is the slope of the line in the graph below? Show your work. Answer: To find out the slope‚ you must first take two separate points on the graph‚ such as (-5‚-1) and (0‚1). Then‚ it’s a simple matter to use the equation [pic] to find the slope: [pic]=
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Department of Information Science‚ College for Women‚ Kuwait University ICS 240 – Fall 2008-09 Home Works #1 1. Write a program that prompts the user to input the length and width of a rectangle and then prints the rectangle’s area and perimeter. 2. Write a program that does the following: a) Prompts the user to input five decimal numbers b) Prints the five decimal numbers c) Converts each decimal number to the nearest integer d) Adds the five integers e) Prints the sum and average
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Raw Data: Table 1.1: Raw Data Table Temperature (°C) ±0.5 Initial Mass (grams) ±0.001 Final Mass (grams) ±0.001 Initial Volume (cm³) ±0.5 Final Volume (cm³) ±0.5 Pressure (hPa) ±0.5 24.0 0.000 0.072 0.1 60.4 1008.0 24.0 0.000 0.060 0.1 55.9 1008.0 24.0 0.000 0.053 0.1 54.9 1008.0 24.0 0.000 0.044 0.1 45.4 1008.0 24.0 0.000 0.032 0.1 34.3 1008.0 24.0 0.000 0.025 0.1 23.3 1008.0 Table 1.2: Qualitative Data: Before During After Magnesium
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Biodegradable Styrofoam Made from Milk and Clay Objectives - The researchers will intend to develop the Styrofoam-plastic out of mostly milk proteins and clay. The material is lightweight‚ sturdy and largely biodegradable. The researchers will make sure that the end result doesn’t smell like spoiled milk. - Casein—milk proteins—is already used in making paper coatings and has an excellent barrier properties. But it has its limited mechanical strength and is water resistant. To make it more resilient
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Colleen Hamilton AP Lab 4: Determining the Rate of Cellular Respiration of Peas at Varying Temperatures and Stages of Germination I. Purpose and Intro The purpose of this lab is to determine the rate at which germinating peas respirate at varying temperatures and stages of germination. Cellular respiration is the set of metabolic reactions and processes that takes place in an organism’s cells in order to create ATP from sugar. It occurs in the mitochondria and comprises three stages: glycolysis
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