Explain the effect of temperature of langmuir isotherm?
Calculate the entropy of the process of freezing of benzene under 1 atm pressure in 2 cases
a. Reversible solidification at 50C knowing the freezing temperature of benzene is -2370 cal/mol.
b. Non-reversible freezing condensation at -50C.
Knowing the heat capacity of solid and liquid benzene is 30,3 and 29,3 cal/mol.K espectively.)
Gaseous feed to the reactor composition 75% butane ( C3H8) and 25% hydrogen ( percent by volume) is burned in a reactor with 25% excess air. The percentage conversion of butane to CO2 95% and the balance to CO. Calculate the mole composition of the stack
why cant we apply catalytic combustion to particulate matter laden gases?
Based on different size of droplets as calculated/ reported in part 2, how long they will take to settle down on surface. Use three different size (max, average, min) (Fluid mechanics might help you)
Q. a) Enlist excavating equipment. Draw a neat sketch
and explain working of any two excavating equipment.
b) Write short note on
i) Crawler Tractor.
ii) Wheel Tractor.
Could you please do a unit analysis on Riedel and Antoine equation to determine the units of the empirical coefficients. Pressures in kPa and temperatures in Kelvin.
Riedel equation : lnP(T) = Ar + Br/T + Cr.ln(T) + Dr.T6
Antoine equation: lnP(T) = Aa - Ba/(Ca+T)
I know this is multiple questions, I am going to post it six times each time asking for a different question, but I also know these questions build off each other so I couldn't just post the prompt and one question without the others.
Please answer question 4 (or it all :D)
An existing industrial wastewater treatment plant fails to treat
a new chemical, pentachlorophenol, leaving the facility in its
waste stream. A concentration of 100 μg/L pentachlorophenol now
passes through the wastewater treatment plant and is released into
the Willimantic River (a class B water) that is stocked with trout.
UConn draws drinking water from a well field adjacent to the
Willimantic River. The wastewater treatment plant releases an
average flow of 0.2 MGD into the river. The average flow of the
Willimantic River just upstream
of the treatment plant is 100 cfs (ft3/s). Based on the chemical nature of pentachlorophenol, it adsorbs to the sediment as it travels downstream, resulting in a loss rate of about 0.01/day.
Answer the following questions:
1. Draw the system, a control volume, and label all knowns and unknowns, inputs, outputs, sources or transformations.
2. Identify the regulations that apply to the contaminant in this scenario and state the specific regulation and the maximum concentration that should not be exceeded to protect aquatic life and human health.
3. What are the risks posed by the contamination in this system? Identify all concerns you may have given the contaminant and the exposure in the environment. Justify this based on research on how the contaminant behaves in the environment and how people use the river.
4. Calculate the maximum concentration of pentachlorophenol in the stream right where it enters the Willimantic River. Draw what the concentration (y-axis) would be in the stream vs. distance and vs. time (x-axis). Estimate and justify any other parameters you may need.
5. Estimate at what distance downstream will the contaminant concentration meet the aquatic life criteria?
6. Research and explain two treatment processes that could be installed at the treatment plant to reduce the pentachlorophenol concentration. Explain the process and why it works for this particular chemical.
Calculate the necessary pump horsepower across a system, along with the pressure developed in the pump for a system containing a liquid solution with a density of 1220 kg/m3 , moving at a volumetric flow rate of 0.56 m3 /min. The liquid initially sits in a large open storage tank and is transferred to the pump via a schedule 80 stainless steel pipe with a nominal diameter of 4 in. The discharge pipe (also schedule 80 stainless steel) from the pump has an inner diameter of 2.5 in. The liquid discharges to an open tank, 21 m above the liquid level of the feed storage tank. The flow through this system can be assumed turbulent and the total friction loss is 30 J/kg. The pump has an efficient of 83%.
copper fin 1.0 mm thick is placed on a circular tube. The out side daiameter of the tube is 2.5 cm. The fin long is 8 mm and the thermal conductivity is 379 W/m °C. The tube wall is maintained at 473K. The fin is exposed to an environment with h = 30 W/m "C and T∞= 288K. %3D Calculate the heat lost by the fin.
Within 100 g of pure benzene (C6H6) with freezing and boiling temperatures of 5.5 oC and 80.1 oC respectively 24.4 g of biphenyl (C12H10) dissolves. Benzene freezing point lowering and boiling point rise constants 5.12 K kg mol-1 and 2.63 K kg mol-1 According to the solution at 80.1 oC Find the freezing and boiling temperatures of the solution as well as the vapor pressure. (Your normal gasoline steam pressure at boiling temperature of 80.1 oC p1 o = 760 mmHg.)
Air at 10°C and I atm flows over a flat plate (30 cm x100 cm) at 20 m/s. The plate is maintained at 70°C. (a) calculate the boundary layer thikness at distances of 30 cm and 100 cm, (b) calculate the heat transfer from first 30 cm and from whole the plate.
The following weather reactions are taking place at 0.7L PFR: The reaction temperature is 520oC, the pressure is 1 atmosphere pressure, and the initial reaction is composed only of acetone. The results of measuring the conversion rate when changing the mass flow rate of acetone are shown in the table below. When the response is secondary, calculate the response rate constant. The molecular weight of acetone is 58.
CH3COCH3 (acetone) CH3=C=O + CH4
|Mass Flow Rate (g/hr)||50||21||10.8|