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Study Resources (Chemistry)

Example 11.3-1 A well-stirred batch reactor wrapped in an electrical heating mantle is charged with a liquid reaction mixture. The reactants must be heated from an initial temperature of 25°C to 250°C before the reaction can take place at a measurable rate. Use the data given below to determine the.
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Example 9.5-4 The ethanol dehydrogenation reaction of example 9.5-3 is carried out with the feed entering at 300oC .The feed contains 90.0 mole % ethanol and the balance acetaldehyde and enters the reactor at the rate of 150 mol/s. To keep the temperature from dropping too much and thereby decreasing the.
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9.12.In the production of many micro electronic  devices ,continuous chemical vapor deposition processes are used to deposit thin and exceptionally uniform silicon do oxide films on the silicon wafers one CVD process involves the reaction between the silane and oxygen at a very low pressure. The feed gas , which contains.
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Example 10.1-2 Methanol may be produced from carbon monoxide and hydrogen in the reaction The fresh feed which contains CO and H2 in stoichiometric  proportion enters the process at a rate of 2.2 m3/s at 25oC and 6.0 MPa and combines the adiabatically with a recycle stream .The combined stream is.
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Example 9.5-2 Methane is oxidized with air to produce formaldehyde in a continuous reactor . A competing reaction is the combustion of methane to form CO2. 1.CH4 (g) + O2HCHO(g)+H2O (v) 2.CH4(g)+2O2CO2+2H2O(v) A flow chart of the process for an assumed basis of 100 mol of methane fed to the reactor is shown here. .
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MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. 1)What characterized the 19th-century dining style created by Carême called grande cuisine? A)simplified sauces and garnishes B)elegant home cooking C)intricately prepared and garnished courses D)light, naturally flavored foods 2)What 20th-century food movement emphasized naturally flavored and.
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9.64.In a surface coating operation a polymer dissolved in liquid acetone is sprayed on a solid surface and a stream of hot air is then blown over the surface ,vaporizing the acetone and leaving a residual polymer film if uniform thickness Because environmental standards do not allow discharging acetone into.
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SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question. 18)In a professional kitchen, who is responsible for coordinating the kitchen staff and its activities? 19)Who is responsible for training, overseeing and organizing the staff and its activities in the dining room of a restaurant?.
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Example 9.5-3 The de hydrogenation of ethanol to form acetaldehyde C2H5OH(v)CH3CHO(v)+H2(g) is carried out in a continuous adiabatic reactor .Ethanol vapor is fed to the reactor at 400oC and a conversion of 30 % is obtained Calculate the product temperature . .
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Example9.2-1 Hess's law The standard heats of the following combustion have been determined experimentally Use  Hess's law and the given heats of reactions to determine the standard heat of the reaction. Test yourself 1. What is Hess's law ? 2.Suppose heats of reaction at 25oC are measured experimentally for the following set of.
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Test Yourself Consider the flow chart here for a non reactive mixing - separating process. 1. How many local degrees of freedom does each unit possess? 2.How many total degrees of freedom does the entire process system possess? Example 10.2-1 Two streams are mixed adiabatically Each stream may contain any of five components (A,B,C,D) No.
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Example 9.4-1 Calculation of a heat of reaction for the de hydrogenation of ethane : C2H6C2H4+H2 Example 9.5-1 Energy Balance About an ammonia Oxidizer The standard heat of reaction for the oxidation of ammonia is given below: 4NH3(g) +5 O2 (g)4NO(g) + 6 H2O (v) ΔH r = -904.7kJ/mol One hundred mol NH3 and 200 mol O2.
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Problems 2.Benzene and chloro benzene  are being separated in a distillation column. Vapor and liquid streams each containing both species , are fed to one of  the r=trays of the column and liquid and vapor streams are taken off the tray The tray functions as an ideal stage the effluent streams.
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Example 11.2-2 A liquid phase reaction with stoichiometry A----->B takes place in a continuous well-mixed 10.0 liter stirred tank reactor. A schematic diagram of the process is shown below. The reactor may be considered perfectly mixed, so that the contents are uniform and the concentration of A in the product stream.
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Example 11.2-2 A liquid phase reaction with stoichiometry A----->B takes place in a continuous well-mixed 10.0 liter stirred tank reactor. A schematic diagram of the process is shown below. The reactor may be considered perfectly mixed, so that the contents are uniform and the concentration of A in the product stream.
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9.34.Carbon disulfide , a key component in the manufacturer of rayon fibers is produced in the reaction between the methane and sulphur vapor over a metal oxide catalyst. Methane and molten sulfur each at 150oC are fed to heat exchange in stoichiometric proportion Heat is exchanged between the reactor feed and.
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Test yourself 1.What is the adiabatic flame temperature of a fuel ? 2. Suppose Tad is the adiabatic flame temperature calculated for a given fuel +air feed to a furnace .Give two reasons why the actual  furnace temperature might be less than Tad. 3.Why should the adiabatic flame temperature be much higher for.
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Problems: 11.2 One hundred fifty kmol of an aqueous  phosphoric acid solution contains 5.00 mol % H3PO4. The solution is concentrated by adding pure phosphoric acid at a rate of 20.0 L/min. (a) Write a differential mole balance on phosphoric acid and provide an initial condition 11.4 A 10.0 ft3 compressed air.
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Example 10.3-2. Ethane is dehydrogenated to ethylene and acetylene in the following pairs of catalytic reactions. Where y denotes mole fraction The product gas goes to a complete separation process that separates 95 % of the un reacted ethane from the ethylene acetylene and hydrogen and recycles the separated ethane to the.
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Chapter 2 MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. 1)What type of hazard is pieces of broken glass found in a container of salad dressing? A)biological hazard B)chemical hazard C)physical hazard D)pest infection 2)How can you detect if food is contaminated? A)"off" odors B)visible.
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Example 10.3-1 A stream containing 35.0% wt% benzene 50.0% toluene and the balance xylene is fed to a distillation column. The over head product from the column contains 67.3% benzene and 30.6% toluene The bottoms product is fed to a second column The over head product from the second column contains.
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Example 9.3-1 Determination of a heat of reaction from heats of formation Determine the standard heat of reaction for the combustion of liquid n - pentane ,assuming H2O (I) is a combustion product. Test  yourself 1.The standard heat of the reaction 2 CO2C+O2 is ΔH r = +221.0 kJ/mol. Use this result to calculate the.
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