{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

DiffusionHW - ENV 6015 Diffusion Problem Set 1 Salt water...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
ENV 6015 Diffusion Problem Set 1. Salt water containing 11700 mg/l of NaCl (0.2 mole per liter) lies beneath a one-foot lens of fresh water, which is essentially, salt free to begin with. Find the concentration of NaCl in the lens after 30 days contact. Assume a constant temperature of 15 o C. 2. The initial dissolved oxygen concentration of an acquiescent body of water 1-foot deep is 5.0 mg/L. Assume the rate of absorption of oxygen from the atmosphere is sufficiently fast to saturate the surface layer of the water in a relatively short period. Find the concentration after one week if the temperature of water remained constant at 15 o C. 3. Sucrose solution to 20 o C has a viscosity n 3 = 1.01 x 10 -2 gm cm -1 sec -1 . If the density of sucrose is 1.59 gm/cm 3 and diffusivity D 1 = 0.36 cm 2 /day determine the molar concentration of the solution. Also, determine the molecular diameter. 4. An experimental channel of 200 ft. long 2.5 ft. wide and 2 ft. deep was used for dye studies. The water depth in the flume was 1.0 ft and the stream flow was kept constant at a rate of
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}