An equimolar mixture of A and B is flashed. What is the maximum possible liquid concentration of B in the product? Assume that A is more volatile and the relative volatility is 4.38.

The answer should be within 0.02 of the correct answer.

. The purchased cost of 200000 inch3 stainless hemispherical tank in 1996 was RO 10700. If the tank is covered fully with 2 inch thickness magnesia block, estimate the present total cost for installed and insulated tank. The cost for covering 2 inch magnesia was 5.1 RO per ft2 and installation labor cost 4.3 RO per ft2 .

On the basis of field observations and information from the local authority and water suppliers, identify the major consumer processes utilizing your local river system. What possible conflicts could arise and how might these conflicts be rationalized?

As head separations engineer at BASF, you are designing a distillation process to separate chlorobenzene and benzene. Your initial feed stream is a saturated liquid, has a flowrate of 500 kmol/hr and is 50 mol% benzene. The column available to you has a total condenser and a partial reboiler. The average relative volatility is 2.5. You need to achieve a distillate that is 4 mol% chlorobenzene and a bottoms that is 97 mol% chlorobenzene.

a) What are the distillate and bottoms flow rates?

b) What is the minimum reflux ratio? How many stages would you need if you operated at the minimum reflux ratio?

c) If your reflux ratio is infinite, what is your boil-up ratio? How many stages would you need if you operated at infinite reflux?

Hint: Apply your knowledge of multi-component distillations.

The initial information you received from the reaction design team was incorrect. Your feed stream is actually arriving as a saturated vapor.

d) Now that your feed stream is a saturated vapor, do your distillate and bottoms flow rates change? If so, what are they now?

e) If your feed stream is a saturated vapor, what is the minimum reflux ratio? How many stages would you need if you operated at the minimum reflux ratio?

f) If your feed stream is a saturated vapor and your reflux ratio is infinite, what is your boilup ratio? How many stages would you need if you operated at infinite reflux?

Hint: Apply your understanding of distillations at total reflux.

Climate change is affected by:

Interactions between the land and the atmosphere

The earth's energy balance

Cold fronts

Warm fronts

Snowstorms

Interactions between the land and the oceans

Interactions between the oceans and the atmosphere

A double-pipe heat exchanger operating in counter current mode is to heat a
fluid(Cp 1.7 kJ/kg K) from 50°C to 95°C at a rate of 4.5 kg/s. The heating is to be
accomplished by hot fluid (Cp=1.97 kJ/kg K) available at 200°C at a mass flow
rate of 6 kg/s. The inner tube is thin-walled and has a diameter of 4 cm. If the
overall heat transfer coefficient of the heat exchanger is 680 W/m2
°C,
determine the length of the heat exchanger required to achieve the desired
heating.

Data given:

Plastic 0.4 W/mK
brick 0.72W/m°C
plaster 0.36 W/m°C
cement 1.4 W/m°C
Polyurethane foam 0.025W/m °C
Glass fiber/fiber glass 0.036 W/m °C
Air 0.0198 W/m °C
Copper 380W/m °C

# just take the required data that u need

Consider steady heat transfer between two large parallel plates at
constant temperatures of T1 582 K and T2 196 K that are 6.8 cm apart.
Assuming the surfaces to have emissivity 0.9 , determine the rate of heat
transfer between the plates per unit surface area assuming the gap
between the plates is

(a) filled with atmospheric air

(b) evacuated

(c) filled with fiberglass insulation, and

(d) filled with super insulation having an apparent
thermal conductivity of 0.00045 W/m · °C.

Data given:

Plastic 0.4 W/mK
brick 0.72W/m°C
plaster 0.36 W/m°C
cement 1.4 W/m°C
Polyurethane foam 0.025W/m °C
Glass fiber/fiber glass 0.036 W/m °C
Air 0.0198 W/m °C
Copper 380W/m °C

# just take the required data

An electric wire having a diameter of 2.3 mm and covered with a plastic
insulation of thickness 0.63 mm is exposed to air at 336 K and h= 32W/m2 K. It
is assumed that the wire surface temperature is constant at 415 K and is not
affected by the covering. Calculate the value of the critical radius. Calculate the
heat loss per m of wire length with no insulation and heat loss with insulation
being present.

Data given:

Plastic 0.4 W/mK
brick 0.72W/m°C
plaster 0.36 W/m°C
cement 1.4 W/m°C
Polyurethane foam 0.025W/m °C
Glass fiber/fiber glass 0.036 W/m °C
Air 0.0198 W/m °C
Copper 380W/m °C

# take from the data given just the required

A distillation column is required to purchase for a petrochemical industry. The chief engineer of the industry wants to evaluate the cost of the distillation column to make his purchase worthy. The data is not available with the vendor. So chief engineer of the company predicts that the estimation by using cost index data is most suitable to determine the cost. But the cost index table is available from the year 1980 to 1990. As a chief engineer describe a procedure to calculate cost of the equipment in current year 2020.

1. A slurry of particles with density 2000 kg/m3 is to be loaded into a thickener where the resulting voidage fraction is 0.89 and the superficial particle velocity is 2.8 mm/s. Calculate the particle system velocity.
2. Consider batch sedimentation system performed within a measuring cylinder where solids are settled according to Type 1 settling. The voidage fraction after the settling is 0.35 and the particle density is 2500 kg/m3 while the particle velocity is 0.0015 m/s.
2.1. What is the net flow of the solids?
2.2. Calculate the free falling velocity or terminal velocity if the correlation for the exponent n = 0.4.

An ideal benzene toluene mixture contains 6 moles of benzene and 4 moles of toluene at 25 ° C. The saturation steam pressure of pure benzene at 25 ° C is 96 Torr, the saturation steam pressure of pure toluene is 29 Torr. Initially, the mixture at 760 Torr pressure is only liquid. The total pressure is then slowly reduced to a pressure of 60 Torr. Calculate the composition of liquid phase and vapor phase, and liquid and vapor mole fractions. (please show all the steps)

Discuss the purpose of the following chemicals used in industrial waste treatment:

3.1 Hydrogen Sulphide

3.2 Carbon Dioxide

3.3 Chromium

3.4 Carbon Monoxide

Electrical properties were determined for a new material called dragonite which is considered to be a metallic conductor. It was found that its electrical conductivity is 2.5*10^7 and electron mobility is 0.003 . For dragonite, you can assume a density of 8.1  and an atomic mass of 75.4 .

What is the number of free electrons per atom in this material? Enter your answer as a number to two decimal places.

The selection of dissolution media is considered from :
1. Solubility of active ingredient
2. Stability of active ingredient
3. Sink condition
4. Permeability of active ingredient in digestive tract
A. 1,2,3
B. 1,3
C. 2,4
D.4
E. All correct