College Nursing Papers

Problem statement: An equimolar mixture of carbon disulfide (CS2) and carbon tetrachloride (CCl4) is formed in an industrial process, and a distillation column is used to separate them. The distillation column receives this feed at a flowrate of 30 mol/s. The top product should have 97mol% CS2, and the bottom product should have 4mol% CS2. The feed enters the column at 30 oC. Pressure = 1 atm.

Determine:

a)      Number of real trays required if reflux ratio is twice the minimum reflux ratio (using Hysys).

HINTS:

For hand calculations: the parameters required for q value calculation (e.g. latent heat of vaporization of feed) and the equilibrium (x-y) diagram needs to be obtained from Hysys. For column diameter and tray spacing, refer to Chapter 4 in the book and Appendix E. You will need average density, viscosity, surface tension, etc. You can take the average of their values at top and bottom trays. Ideal gas law can be used for vapor phase if required. Any such assumption should be mentioned clearly and with justification in the report. You may also see this: http://learnche.mcmaster.ca/wiki_4M3/images/c/c7/Distillation-project-report-vanHoogstraten-Dunn-UCT-1998.pdf

In Hysys: to find the number of trays, create the process using Simulation → Column → Short Cut Distillation.

The materials below may help you with the problem. For more materials, use google.

Related to distillation design in Hysys:

           https://www.youtube.com/watch?v=x9ypmKKekYA

           https://www.youtube.com/watch?v=X31e0PkGopo

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A hot water heater operating at 240 V supplies to a quantity of water to warm it to the desired temperature of . What is the cost of the energy if the rate is $0.131/kWh?

a. The mass of the water is needed to answer this question.

b. The initial temperature of the water is needed to answer this question.

c. The mass of the water, the initial temperature of the water, and the time it took to heat the water is needed to answer this question.

d. $0.330.

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a long circular pipe with outside radius R = 1.94 cm carries a (uniformly distributed) current i = 14.8 mA into the page. A wire runs parallel to the pipe at a distance of 3.00R from center to center. Find the magnitude of the current in the wire in milliamperes such that the ratio of the magnitude of the net magnetic field at point P to the magnitude of the net magnetic field at the center of the pipe is 2.02, but it has the opposite direction.

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The pulley in the diagram below is a solid disk of rotational inertia I and radius

R. The suspended block has mass m. If the suspended block starts from rest and descends to a

position h lower, what is its speed when it is at this position? Give your answer in terms of I, R,

m and g.

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An uncharged conductor has a hollow cavity inside of it. Whithin this cavity there is a chare of +10μC that does nottouch the conductor. There are no other charges in thevicinity. Which statement about this conductor is true? (There may be more than one correct choice.)a. The outer surface of the conductor contains+10μC of charges and the inner surface contains-10μC.b. The net electric field within the material of theconductor points away from the +10μC charge.c. The inner surface of the conductor carries a chargeof -10μC and its outer surface carries no excess charge.d. Both surfaces of the conductor carry no excess chargebecause the conductor is uncharged.e. The inner and outer surfaces of the conductor ieachcontain charges of -5μC.

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A charge of -3.50 nC and a charge of -5.85 nC are separated by a distance of 40.0 cm. Find the position at which a third charge of +7.40 nC can be placed so that the net electrostatic force on it is zero.

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An 1150-kg car pulls a 450-kg trailer. The car exerts a horizontal force of 3,800 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.15 for the trailer.

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How do I rank the compounds copper(II) sulfate pentahydrate, benzoic acid, ehtyl 4-amniobezoate, and 9-fluorenone in order of increasing water solubility. Provide a brief statement concerning intermolecular forces that justifies your trend.

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The solubility product constant for K2PdCl6 is 6.0×10–6

K2PdCl6 (s) <–> 2 K+ (aq) + PdCl6 2- (aq)

What is the K concentration of a solution prepared by mixing 50.0 mL of 0.400 M KCl with 50.0 mL of

a) 0.100 M PdCl62– 

= ? M

b) 0.200 M PdCl62– ?

= ? M

c) 0.400 M PdCl62– ?

= ? M

(a question almost the same as been solved previously on here, but the ksp and last molar value is different and even when I follow along and insert my numbers, I’m not getting the right answers)

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An electron enters a parallel plate apparatus 10.0cm long and 2.0cm wide, moving horizontallyat 8.0 ﾗ 10^7 m/s. (top plate is positive, electron is 1.0cm from each plate..) The potential difference between the plates is 6.0 ﾗ 10^2 V. Calculate…(a) the vertical deflection of the electron from its original path.(b) the velocity with which the electron leaves the parallel plate apparatus.—-Im really confused with questions asking for vertical deflection…im not sure what formula to use..should i be using the formula for energy where U=mgh and solve for h? this is the only thing i can think of..any help would be great

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