design response report to a heat exchanger problem where ethylene glycol and a poor quality feed of water are put through a shell and tube exchanger with the objective of cooling the ethylene glycol feed. A shell and tube exchanger was chosen over several other exchangers due to its high efficient performance and its relative ease of maintenance in processing these fluids. From the data given and specific heat capacity researched for ethylene glycol‚ a MatLab script was constructed to calculate values
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industrially practical polyethylene synthesis was discovered (again by accident) in 1933 by Eric Fawcett and Reginald Gibson at the ICI works in Northwich‚ England.[6] Upon applying extremely high pressure (several hundred atmospheres) to a mixture of ethylene and benzaldehyde they again produced a white‚ waxy‚ material. Because the reaction had been initiated by trace oxygen contamination in their apparatus the experiment was‚ at first‚ difficult to reproduce. It was not until 1935 that another ICI chemist
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peak bottom line. Iodide to triiodide Glycol Didn’t work Using equation ip = 2.69 ×105 n3/2 A D1/2 C ν1/2 compare to linear equation y = mx+c y = peak current x = V1/2 c = zero Therefore m is = everything else C = concentration 0.05 M ethylene glycol (acetonitrile ?) two e- transfer A = area of platinium elecrtrode given work out D (diffusion coefficient) of iodide Prelim have to wrk out open circuit potential diff between no light and light on. Increase in potential due to light
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for minimizing cost‚ size‚ and complexity. Initial Parameters The initial parameters were the operating requirements of the Diesel-Engine Generator Set 1500-XC6DT2 are as follows: Coolant capacity – The coolant chosen for our radiator is ethylene glycol (50/50 % by volume) Its maximum operating temperature of 225F Air flow rate – Since the generator is stationary as opposed to that used in an automobile application‚ a fan will be needed to provide the necessary flow rate. The required
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Core 1 summary notes 1) Fossils fuels provide both energy & raw materials such as ethylene‚ for production of other substances Identify the industrial source of ethylene from the cracking of some of the fractions from the refining of petroleum Catalytic cracking is the process whereby high molecular weight fractions are broken down to low molecular weight ones. This process is used in petroleum refineries where crude oil is broken down to smaller alkenes and alkanes‚ until ethene‚ propene‚
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Chapter 39 Plant Responses to Internal and External Signals No groups of plants is more important to human survival than seed plants plants are key sources of food fuel wood products and medicine our reliance of plants Products from Seed Plants Most of our food comes from angiosperms Six crops yield 80% of the calories consumed by humans Wheat Rice Maize Potatoes Cassava sweet potatoes Other Products from Seed Plants Secondary compounds of seed plants are used in medicines
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immune to this shifting landscape. Hot melt adhesives‚ in particular‚ are being hard hit. Supply threats‚ both novel and resurgent‚ are altering the framework of hot melt adhesives’ raw materials supply. The supply of waxes‚ rubbers‚ tackifiers and ethylene vinyl acetate (EVA) is affected. Broad trends—rising oil prices related to upheaval in the Middle East and unexpected supply chain disruption caused by the recent earthquake‚ tsunami‚ and nuclear crisis in Japan—are changing the way business is being
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research the chemistry behind a chemical reaction that is used in automobiles. Write a page that explains what the reaction is‚ where it occurs in the car‚ and what it does for the car. There are over one billion of cars around the world‚ getting people where they want to go. Therefore‚ automobile transportation became much more important in everyone’s daily life. Chemistry made the automobiles to work. The chemistry and chemical reactions used in many parts of the automobiles. The role of chemistry
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Spice Qualities and Specifications I. SPICE SPECIFICATIONS A. Introduction A spice can be defined as the dried aromatic parts of natural plants‚ whose characteristics such as color and constitution may vary depending on year of harvest and place of harvest‚ among other factors. The quality of processed spices can also vary due to differences in separation and milling processes used. For these reasons it has been deemed necessary to establish quality standards or specifications for
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polystyrene‚ Teflon®‚ Formican®‚ and Saran‚ all of which are synthetic polymers. The technological impact of polymer chemistry is immense and continues to increase. ̣ ̣ The product of this step is also a free radical that can react with another ethylene molecule according to HOCH2CH2CH2CH2 +
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