The azeotrope of the benzene-cyclohexane system has a composition of 53.2 mol% benzene with a boiling point of 350.6 K at 101.3 kPa. At this temperature the vapour pressure of benzene (1) is 100.59 kPa and the vapour pressure of cyclohexane (2) is 99.27 kPa. Determine the activity coefficient for the solution containing 10 mol% benzene

A 30.0-liter cylinder of gas containing 97.0 mole % CO and 3.0% CO₂ is delivered to your plant. You sign the receipt for it, noting that the gauge on the tank reads 2000 psi. Several days later you notice that the gauge reads 1875 psi, indicating a leak. The storage room in which the cylinder is kept has a volume of 24.2 m³ and is very poorly ventilated. Calculate the maximum mole% of CO in the room at the time the leak is discovered, assuming that the leaking gas spreads uniformly throughout the room and the room temperature is constant at 30^oC. Use Kay’s rule if appropriate.

Hint: You will need to use Kay’s rule/assumption. Compressibility factors work great for this problem.

A power plant burns 7.3 tonnes (i.e., 7.3*1000 =7300 Kg) coal per hour and discharges the combustion products through a stack of effective stack height of 75m. The coal has a sulfur content of 4.2% and the wind velocity at the top of the stack is 6 m/sec. The atmospheric conditions are moderately stable. Answer Determine SO2 concentrations for following locations: (0,0,0); (850m, 0,0); (850m, 0,75m); (850m, 0,-75m); (-850m, 0,75m); (0, 0,75m); (850m, ?y, ?z). (ii) Determine distance from stack at which the maximum occurs.

complete a 2 page paper answering this question: What changes will you implement in your personal life in order to be a more accepting and understanding individual?

Explain how to apply formula of Solid-liquid equilibrium in thermodynamics.

Naphthalene is commonly used as a repellent against moths to protect clothing during storage. Consider a 1 cm diameter spherical naphthalene ball hanging in a closet at 25 oC. The density and vapour pressure of naphthalene at 25 oC are 1100 kg/m3 and 11 Pa, respectively and mass diffusivity of naphthalene in air at 25 oC is 0.61 x 10-5 m2/s.

a. consider the variation of diameter with time, determine how long it will take for the naphthalene to sublimate completely.

b. If instead of being stored in a closet, the naphthalene is exposed to dry air flowing at a velocity of 2 m/s. Both the naphthalene and the air were kept at 25 oC. It is observed that 12 g of naphthalene has sublimated in 15 min. Determine the mass transfer coefficient and the flux for mass transfer from naphthalene.

How can a mass and energy balance of a cement ball mill be written/expressed?

#1 A) Are the solutions made from these compounds acidic, basic or neutral solutions?

a. NaF b. RbCl c. Sn(NO3) d. MgS e. CrI3

#1 B) Acid/base strength

a. Put these in order of increasing basicity

CO3-2, I-, NH2-, HSO4-, OH-, NO3-

b. Put these in order of increasing acidity

HI, NH3, HCO3-, HF, H2O, HClO4

Calculate the density (in g/cm³) of an AX compound given that it has the rock salt crystal structure and that the radii of the A and X ions are 0.137 and 0.241 nm, respectively. Assume atomic weights of 30.7 and 100.2 g/mol for the A and X elements, respectively.

Two moles of gas are confined in a piston–cylinder device. Initially, the temperature is at 300 K and the pressure is 1 bar. The gas is compressed isothermally to 5 bar. If the ideal gas heat capacity is C ig P = 7R/2, find Q, W, ?U, ?H, and ?S if:

(a) the gas is ideal, or

(b) the gas satisfies the van der Waals equation of state with a = 5.0 × 106 bar · cm6/mol2 and b = 30 cm3/mol.

(c) Comment on the differences

The separation of solid particles into different fractions based upon their terminal velocities in a liquid is called hydraulic classification. For example, consider two particles with different settling velocities placed in a rising current of water. If the water velocity is adjusted to a value between the terminal settling velocities of the two particles, a separation will result: the slower- settling particle will move upward with the water while the faster settling particle will settle out to the bottom.

A mixture of ground galena and limestone with specific gravities of 7.5 and 2.7, respectively, is to be separated by hydraulic classification using water at a velocity of 0.01 ms-1 and at a temperature of 20 C. The solid feed contains 20% Galena and 80% limestone on a dry mass basis and the following size analysis is applicable to both solids:

Diameter (um) 20 40 60 80 100 120 140 160 180

CUS (mass)% 33 53 67 77 83 88 91 93 100

Assuming free settling condition and spherical particles, calculate:

a. The size ranges of galena and of limestone particles that will be carried away in the water stream.

b. The mass fractions of galena and limestone in the overhead and bottom streams leaving the classifier.

c. Would it be possible to obtain pure galena in the bottom stream with water as the classifying fluid? If yes, what would be the water velocity required, and the product size range be? Show calculations to support your answers.

Cyclohexane can be produced by reacting benzene with hydrogen: ??6??6 + 3 ??2 ? ??6??12 A fresh feed of benzene combined with 20% excess hydrogen is blended with a recycle stream and fed to a reactor. The recycle stream is 22.74% benzene and the rest hydrogen, on a molar basis. The reactor achieves a single-pass conversion of benzene of 20%. The reactor effluent is sent to a separator, where one stream is the recycle and the other is the product. It is desired to attain a 95% overall conversion of benzene. (a) To make that happen, what must be the ratio of the flow rate of the recycle stream to the fresh feed stream, in units of moles recycle per moles fresh feed? (b) What is the molar flow rate of the product stream? What are the mole fractions of chemicals in this stream?

Fluid Mechanics Topic
Why is it important to know if the flow is laminar or turbulent ?
Like why do we care to know whether its laminar or turbulent.
Please i need a correct logical answer. It has nothing to do with reynolds number.

In detail, describe how waste engine oil can be reused in car again, its application and treatment method.

Categorize the following solvent recovery operation in terms of the waste management hierarchy. Discuss the pollution prevention features of this process. Determine whether this process is pollution prevention or not. Use both the federal definition and also the expanded definition adopted in this text. Process Description: The automotive industry uses robots to paint automobile bodies before attaching them to the chassis, and installing other components such as the drive train, lights, trim, and upholstery. In order to accommodate different colors, the paint lines must be flushed with a solvent and then re-charged with the new color paint. In the past, this solvent and paint residue was disposed of as hazardous waste or incinerated. The current process of spray painting automobiles uses a closed-loop solvent recovery process as outlined in the diagram below.