A mixture of water at 500 kPa and a quality of 20% is heated in an isobaric process until its volume becomes 0.52261 m^3/kg. Find:

a. the change in specifc volume

b. the work/unit mass

c. the change in specific internal energy

d. the heat transferred/unit mass

e. the change in specific enthalpy

f. the final pressure

g. the final temperature

Assume that the water temperature is 10°C and the depth of the settling tank is 3.0 m. Calcium carbonate precipitates with a relative density of 1.20 and diameter of 0.10 mm to be removed in a settling tank after softening treatment. Assume discrete particle settling. At 10°C the density and viscosity of water are 999.77 kg/m3 and 1.308x10-3 kg/m.s.

a. Calculate the theoretical settling velocity (cm/s), tank loading (m3 /m2 /d) and detention time (h) required for the removal.  

b. How will the settling velocity change, if the viscosity, particle diameter, and the relative density increases by 10%? How will the settling velocity change if the water temperature is 25 oC instead of 10 oC? Vary only one parameter at a time. Comment; no need to provide calculations.

What was the contribution of Joule in understanding the laws of Thermodynamics?

Assuming capture and recovery efficiencies of 98% and 97% respectively, show that 1,000 ton/day of CO2 would correspond to capturing most of the carbon emissions from a 50 MWe plant fired with coal. State all your assumptions including fuel H/C ratio, and fuel-to-electricity conversion efficiency. How would your answer change if the electrical output of the plant remained the same but you switched from coal to natural gas as the fuel?

You got a new job with Home Paint Pte Ltd who is selling paints to various retailers. The company is able to produce number of unique colours based on blending with several colour based pigments like yellow,red and blue. In order to produce magenta colour product,P, a paint mixture stream,F1,is mixed with another paint mixture stream,F2.F1 contains 30wt% of blue pigment in water whereas F2 contains 12.0wt%red pigment in water.It is given the cost of F1and F2 are $35.00/kg and $20.00/kg,respectively.In order to obtain the magenta colour product,P,the ratio of F1/F2 should be equal to 2.

a)Draw and label the flowchart of the process unit by indicating all the input and output process variables.Perform the degree of freedom (DOF) analysis.

b)By taking basis of calculation,P=10kg/hr,calculate the mass flow rates of F1 and F2.Determine the water composition(wt%) in P.Subsequently,determine the selling price of P ($/kg) in order to make a 100% profit.

c)As the demand of the magenta colour increased, you are required to redesign a larger mixing unit which is capable to produce 350 metric ton/year of P. Using the information from part (b), determine the required scale-up factor.

What are the health effects of the following pollutants?

Carbon monoxide

Airborne particles

Ultrafine particles

Bioaerosols

What are the EMS elements of the Denning Cycle? Describe in relative detail the basic elements of EMS

A compressor receives 0.1 kg/s R-134a at 150 kPa, -10 degrees C and delivers it at 1000 kPa, 40oC. The power input is measured to be 3 kW. The compressor has heat transfer to air at 100 kPa coming in at 20 degrees C and leaving at 25 degrees C.

I'm trying to find the mass flow rate of air, BUT can you please just show me the energy balance and Schematic to set this up. JUST the energy balance and Schematic.

Water is drawn from a reservoir and pumped an equivalent length of 2 miles through a horizontal, circular duct of 10-in. i.d. (wall roughness k = 0.01 ft). At the end of this duct, the flow is divided into a 4- and a 3-in. schedule 40 steel pipe. The 4-in. line has an equivalent length of 200 ft. and discharges to the atmosphere at a point 50 ft. above the surface of the water in the reservoir. This flow must be maintained at 1000 gal/min. The 3-in. line discharges to the atmosphere at a point 700 ft. from the junction at the reservoir level. The pump you are considering has an efficiency of 70. Kinetic energy effects can be ignored. Determine how much horsepower is needed for the system.

In a large boiler with several burners, why is it desirable to balance burner performance? What analytical measurements are helpful?

A cylindrical tank with inner diameter 2.0 m is designed to operate as a fluidized bed reactor for a heterogeneous catalytic reaction. The tank is loaded with a random packing of cubic particles to a height of 4.0 m with voidage 0.4 before the fluidization process. The density and length of each side of the cubic particles are 2600 kg m-3 and 1.0 cm respectively. During operation, a liquid reactant with density 1000 kg m-3 and viscosity 1.0 x 10-3 Pa·s is passed uniformly upwards through the bed to fluidize the particles. Determine the inlet superficial velocity U that needs to be applied to achieve a bed height of 6.0 m during operation of the fluidized bed reactor.

velocity: 24.9m/s

Pressure: 1 atm

diameter: 1.02m

area((pi/4)*D²​): 0.817m^²

^​Wet bulb/ dry bulb temp: 4.5^​oC/26.8^oC

Relative humidity:19.6%

Find dry air flow rate in kg/s.

Propane gas at 1 bar and 35°C is compressed to a final state of 135 bar and 195°C. Estimate the molar volume of the propane in the final state and the enthalpy and entropy changes for the process. In its initial state, propane may be assumed an ideal gas.

Diborane is used in silicon chip manufacture. One facility uses a 500-lb bottle. If the entire bottle is released continuously during a 20-min period. It is a clear, sunny day with a 5mph wind. Assume that the release is at ground level

a. Determine the location of the 5 mg/m3 ground-level isopleth.

b. Assume now that the bottle ruptures and that the entire contents of diborane are released instantaneously. Determine, at 10 min after the release,

(1) The location of the vapor cloud. (2) The location of the 5 mg/m3 isopleth. (3) The concentration at the center of the cloud.

(4) The total dosage received by an individual standing on the downwind axis at the 15-min downwind location.

(5) How far and long the cloud will need to travel to reduce the maximum concentration to 5 mg/m3

Work is highly appreciated, thanks!