Problem 2 Now, the AlaskaBreez group is interested in a detailed analysis of how well their spherical igloo

Calculate (1) viscosity (Pa·s) and (2) thermal conductivity (in W/m∙K) of O₂ at 300 K and atmospheric pressure, using the Chapman-Enskog theory. Use Appendix. K.(Cp 7.019 cal/mol-K and R=1.987 cal/mol-K)

Q4Sketch a block diagram which outlines the design process for building a chemical plant. A minimum of 4 blocks and maximum of 10 blocks is needed. (20%)

At the top of a tall building 55 m wide and 55 m long, the breeze varies seasonally with ReL varying from 5x10^4 to 3x10^5. One meter in from the edge the laminar boundary layer thickness varies from, in cm, closest to: A) fully turbulent down to the rooftop, so 0 cm B) averages 3.5 cm year long C) 0.95 to 0.55; decreases with Re D) 2.24 to 0.91 E) 0.55 to 0.95; increases with Re

Consider the following equations, and pick which system these correspond most closely (assume partial derivatives): * du/dx + dv/dy = 0 * u>>V g=0 * d/dt=0 * largest gradient du/dy * dP/dx >>dP/dy * du/dx > 0 A) 2-D problem unlikely because a third dimension is necessary B) horizontal, likely pump driven, viscous flow, changing diameter or slot thickness C) vertical walls with outer wall moving up, steady state D) outside of the boundary layer in turbulent flow where at U(inf) in plug flow E) horizontal plates, parallel, top accelerating from zero to a fast velocity

Multiple questions. Consider tomato paste concentrate 5.8% with SG=1.12 flowing through 17.2 m of a horizontal pipe with 8 cm ID.An average velocity of 0.063 m/s is desired. On scratch paper show Re and f. The pressure difference in kPa is closest to: A) 623.22 B) 62.3 C) 0.623 D) 6.23 E) 0.0623

Molten chocolate is a Bingham fluid that flows through an 8 cm ID, 10 m long horizontal pipe with a pressure difference of 12 kPa. Find the volumetric flow rate in L/s, closest to: A) 0.323 B) 0.11323 C) 0.00113 D) 0.113 E) 0.03223

Multiple questions. Consider a fluidized bed fed with 2 atm air at 25 C; particles have density 910 kg/m3, size 0.23 mm, shape factor 0.81 and Emf = 0.4. Cross section of empty bed is 0.4 m2 and contains 250 kg solids.Find the Remf and velocity Vmf in m/s, and show work on scratch paper. Min fluidization velocity, m/s, closest to: A 0.088954B 0.001258C 0.01184D 0.006654E0.1698

Consider the vessel in example 7.2-4. Find the mixing time, in seconds, for a vessel with twice the Dr. Use relations for same P/V.Closest to: A) 26.4B13.2C 34.6D) 5.71E 8.65

2. Some diffusion problems in the atmosphere: [8 pts] a. A point source of 1000 g of SO₂ is released. If molecular diffusion (D = 0.12 cm²/s) takes place, (1) how long will it take to reach a standard deviation of 1 cm, 1 m and 100 m respectively, and (2) what are the maximum concentrations at these times? [2 pts each] b. C. By contrast, the molecular diffusion coefficient for a suspension of dust (1μm diameter) in air (Brownian motion) is approximately D = 2.2 x 10° cm²/s. Estimate the times now. Compare these to problem 2(a) and comment on the behavior of smog (made up of SO₂ and dust particles and other stuff!) in inversion layers over cites in which conditions are often without turbulence. [3 pts] An actual measurement during a SO₂ experimental point source release in an inversion layer shows that the half width as measured by the 10% level (i.e., where the concentration is 10% of the center point concentration) is 10 m at 1 hour after the release (see sketch). Estimate the diffusivity. Are these molecular conditions (compare to 2(a))? [3 pts] 021 44 Sxfel 10 m