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.

In: Other

. 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 .

In: Other

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?

In: Other

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.

In: Other

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

In: Other

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

In: Other

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

In: Other

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

In: Other

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.

In: Other

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.

In: Other

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)

In: Other

**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**

In: Other

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.

In: Other

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

In: Other

A chimney with a design stack height of 200m is emitting SO2
at a rate of 600g/s on a sunny day in summer, with moderate wind
speed at the stack altitude. the volumetric flow rate is measured
as 26m3/s, and the wind speed at a height of 10m above the ground
is 5m/s. Calculate the grout level concentration of SO2 1km
downward of the stack

In: Other