Air enters a compressor at 20 oC and atmospheric pressure, and exits at 200 oC and 0.8 MPa. The output stream flows at a linear velocity of 2 m/s, through an exit diameter of 10 cm. What is the power input to the compressor? (Answer: 16.7 kW)

.Calculate the number of copper atoms in a 63.55 g sample of copper. .What is the mass in grams of 0.509 moles of AlCl3? .Which of the following 100.0 g samples contains the greatest number of atoms?

a.  Magnesium

b.  Zinc

c.  Silver

A bottle of commercial concentrated aqueous ammonia is labeled 29.89 % NH3 by mass, density = 0.8960 g/ml.

a. What is the molarity of the ammonia solution?

b. If 250 ml of commercial ammonia is diluted with water to make 3.0 L of solution, what is the molarity of the diluted solution?

Give the raw materials,process description, flow sheet, engineering problems faced in the production of CUPRAMMONIUM RAYONS

Suppose you now work for a small specialty chemical manufacturer. You are tasked with

providing recommendations for Sim software. You have narrowed it down to either of CHEMCAD or

ProSim Plus. Please provide me with a one page (200 words) summary to advise me which one to

purchase. I am looking for you to give me an understanding of what sim software is, and the advantages

or disadvantages of each for my application

Using Antoine’s equation, derive an expression to calculate heats of vaporization as a function of the A, B and C constants in Antoine’s equation and temperature. Use the derived expression to calculate heats of vaporization of water and benzene at their boiling points and 1 atm pressure. Compare the results with tabulated values of water and benzene.

2. What is the exposure rate at 30 cm from a vial containing 20 mCi

(740 MBq) of 131I?

3. In the system of protection devised by the International Commission on Radiological Protection ICRP, absorbed dose to organs and tissues are converted to equivalent dose and effective dose. Explain how and why this is done.

Consider the use of coal for the production of electricity, Describe three advantages and three disadvantages for the use of coal to produce electricity.

There are 4 basic units in a nuclear reactor: fuel rods, nuclear modulators or primary cooling system, secondary cooling system and control rods. During the fission of Uranimum-235 describe the role of each units to control the reaction.

Compare the anthracite and bituminous coals to sub-bituminous and lignite. Your comparison should include:

            a. Where they are found in the US (state)

            b. energy content

            c. mining process   

During the latter third of the nineteenth century, leaders of the European “great powers” managed to avoid a generalized war within Europe, mainly because they were able to settle major disputes within the context of the “concert system.” But the concert system broke down in the summer of 1914. Why?

Consider an electrolytic cell consisting of molten AlCl₃ for the following questions:

(a) How many g of Al will be produced if a current of 0.152 A is passed through the electrolytic cell described above for 1.5 hours?

(b) How many Amps (A) of current is required to produce 1.69 g of Al if the electrolytic cell described above is operational for 1.5 hours?

(c) How much time (in hours) would it take for the electrolytic cell described above to produce 1.69 g of Al if 0.252 A of current is passed through the cell?

Note: Use Faraday constant, F = 96500 C / mole e^-

An underground storage tank has sprung a leak, sending 184 kilograms of ethanol into the

subsurface soil. Ethanol can be used as an electron donor under either aerobic (oxygen is the

electron acceptor) or sulfate reducing (sulfate is reduced to H

2

S) conditions. a) How many

electrons are transferred during the oxidation of ethanol (C

2

H

5

OH) to carbon dioxide (CO

2

)?

b) Construct the stoichiometric energy generating reaction from the half reactions associated

with the aerobic oxidation of ethanol to CO

2

. c) Construct the stoichiometric energy generating

reaction from the half reactions associated with oxidation of ethanol to CO

2

under sulfate

reducing conditions. e) Calculate the standard free energy (



G

0

) available from the sulfate

reducing energy generating reaction and compare it to the energy derived from the aerobic

oxidation. Which of the two modes of metabolism of ethanol provides more energy to the

organism and why you think this is the case? f) If you want to pump aerated water (7.0 mg

oxygen per liter) into the subsurface to support the mineralization of the ethanol, how many

gallons of water will you have to pump?

Use the tables in the Energy Calculations Appendix as needed.

Why is it important to consider the entire size range of particulate matter emissions when designing control strategies?

1. Shell momentum balance for flow between parallel plates. A fluid of constant density is flowing in laminar at steady state in the horizontal x direction between two flat and parallel plates. The distance between the two plates in the vertical y direction is 2yo. a) Derive the equations for momentum flux, velocity profile, average velocity, volumetric flow rate and the force exerted by the fluid on the plate. b) Show the shear stress and velocity profiles on the figure.

Consider the reaction

Fe(s) + 2HCl(aq)FeCl₂(s) + H₂(g)

for which H° = -7.400 kJ and S° = 107.9 J/K at 298.15 K.

(1) Calculate the entropy change of the UNIVERSE when 2.097 moles of Fe(s) react under standard conditions at 298.15 K.

S_universe =  J/K

(2) Is this reaction reactant or product favored under standard conditions?

_________reactantproduct

(3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is reactant favored, choose 'reactant favored'.