A rectangular metal plate is sprayed uniformly with a thin layer of coating of approximately 0.2...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A rectangular metal plate is sprayed uniformly with a thin layer of coating of approximately 0.2 mm in thickness. The rectangular surface has a length of 50 cm and a width of 14 cm. The coating contains acetone that evaporates from the layer to cure the coating. Initially, there is 0.001 mole of acetone per cm of coating loaded in the coating. The plate is heated to maintain a uniform temperature of 40°C, and the vapour pressure exerted by the solvent is 55 kPa at 40°C. Air gently flows parallel to the surface at a velocity of 5.0 cm/s, 1.0 atm pressure and 20°C. You may neglect any molecular diffusion of the solvent through the very thin polymeric film and focus only on the convection aspects of the problem. 3.1. Calculate the mass transfer coefficient (10) 3.2. How long will it take for the acetone to evaporate completely? (10) The following correlations may be used without proof, although you must give reasons in support of your answer: Corelation Conditions Sh = 0.664 Re5 Sc.33 (laminar) Re, <2 x 10 Sh, = 0.0365 Re Sc33 ,0.33 (turbulent) Re, >2 x 105 %3D Properties at 303 K: Diffusivity DAB = 0.0232 cm2/s A rectangular metal plate is sprayed uniformly with a thin layer of coating of approximately 0.2 mm in thickness. The rectangular surface has a length of 50 cm and a width of 14 cm. The coating contains acetone that evaporates from the layer to cure the coating. Initially, there is 0.001 mole of acetone per cm of coating loaded in the coating. The plate is heated to maintain a uniform temperature of 40°C, and the vapour pressure exerted by the solvent is 55 kPa at 40°C. Air gently flows parallel to the surface at a velocity of 5.0 cm/s, 1.0 atm pressure and 20°C. You may neglect any molecular diffusion of the solvent through the very thin polymeric film and focus only on the convection aspects of the problem. 3.1. Calculate the mass transfer coefficient (10) 3.2. How long will it take for the acetone to evaporate completely? (10) The following correlations may be used without proof, although you must give reasons in support of your answer: Corelation Conditions Sh = 0.664 Re5 Sc.33 (laminar) Re, <2 x 10 Sh, = 0.0365 Re Sc33 ,0.33 (turbulent) Re, >2 x 105 %3D Properties at 303 K: Diffusivity DAB = 0.0232 cm2/s
Expert Answer:
Answer rating: 100% (QA)
your writing partner Date Page No 31 Goven Slhe teauperatuve of 40C 8... View the full answer
Posted Date:
Students also viewed these chemical engineering questions
-
Please answer the following questions related to the article provided and submit your paper to the assignment link. Please ensure that you list the article on your References page, and use in-text...
-
Why did the Enron case surface? The Enron case surfaced when senior management of Enron was practicing unethical practices; making to company appear too good to be true. When in reality Enrons...
-
Examine your own organisation, or one that you know. What forms of pre-departure training does it offer?
-
Wilmington Pharmacy, part of a large chain of pharmacies, fills a variety of prescriptions for customers. The complexity of prescriptions filled by Wilmington varies widely; pharmacists can spend...
-
When she was a child, Amy Nicholson spent a lot of time in Southeast Asia. Consequently, Amy is well versed in the local languages (she is fluent in Thai and Tagalog) and customs. Over time, Amy has...
-
pic stands for: a. Private limited company b. Public liability company c. Public limited company d. Public limited corporation
-
What are the advantages and disadvantages of using labor utilization as a performance measure? Do these same arguments apply to machine utilization?
-
A circle centered at (-1, 2) has a diameter of 10 units. Amit wants to determine whether (2,-2) is also on the circle. His work is shown below The radius is 5 units. Find the distance from the center...
-
In receiving terminals of petrochemical plants, some of the liquid natural gas (LNG) storage Tanks are designed to be in ground, to avoid receiving radiation from the sun and also being protected...
-
aces Period Ending Bond Issue B (A) Cash (B) Period Interest Expense. $590,000.0x (E) x 12.0% x Interest Paid (c) Amort. (D) Unamortized 11.0% x 3/12 3/12 Apr. 1/18 (A) - (B) Balance (E) Carrying...
-
What is the essence of a good preliminary survey?
-
How to draft a pretrial memorandum?
-
How can reports on deficiencies be made more meaningful to management?
-
List five questions the preliminary survey can answer for internal auditors.
-
A deficient condition was described as follows in the draft on an audit report: In our test of automotive vehicles, we found that 35 automobiles had been serviced at intervals of 9 to 12 months. We...
-
The following trial balance has been extracted ledgers of Sherry Enterprise, store owner. Trial Balance as at 31 December 2021 Dr (RM) Cr (RM) Sales 400,000 Purchases 350,000 Returns Inwards 5,000...
-
Use Stokes' Theorem to evaluate f(y+sin x) dx+(z+cos y) dy+rdz, where C is the rve r(t) = (sint, cost, sin 2t), t = [0, 2].
-
The accounting rate of return on the initial investment presented in question 4 is: a. 0.125 b. 0.156 C. 0.219 d. 0.375
-
For a typical \($120,000\) investment in equipment with a 5-year life and no salvage value, determine the present value of the tax shield using straight-line depreciation. Assume an income tax rate...
-
Each of the following statements is true regarding capital budgeting decisions, except: a. Capital expenditure proposals involve risk. b. Acommon error is to invest in unnecessary or overly complex...
![Mobile App Logo](https://dsd5zvtm8ll6.cloudfront.net/includes/images/mobile/finalLogo.png)
Study smarter with the SolutionInn App