Problem: When alpha-iron is subjected to an atmosphere of hydrogen gas, the concentration of hydrogen in...

50.1K

Verified Solution

Question

Mechanical Engineering

Problem: When alpha-iron is subjected to anatmosphere of hydrogen gas, the concentration of hydrogen in theiron, CH (in weight percent), is a function of hydrogenpressure, PH2 (in Mpa), and asbsolute temperature (T)according to

CH= 1.34 X 10-2sqrt(PH2) exp(- (27.2KJ/mol) / RT)

Consider a thin iron membrane with the thickness and temperaturelisted below. Calculate the flux in (kg/(m2-s)) throughthis membrane if the hydrogen pressure on one side of the membraneis 0.17 MPa, and on the other side it is 6.1MPa, utilizing thedensities provided by your examination booklet. Assume the valuesfor D0 is 4.9x10-7 m2/s andQd is 13.4KJ/mol.


--Given Values--
Membrane Thickness (mm) = 4.0
Temperature in Celsius = 383

Part A:

What is the concentration of hydrogen at the low - pressure (orB) side in wt%? Write your answer in Engineering Notation.


        Your Answer =

Part B:

What is the concentration of hydrogen at the low - pressure (orA) side in wt%? Write your answer in Engineering Notation.


        Your Answer =

Part C:

What is the concentration of hydrogen at the B face in kilogramsof H per cubic meter (Density for Hydrogen is 7.87g/cm3)? Write your answer in Engineering Notation.


        Your Answer =

Part D:

What is the concentration of hydrogen at the A face in kilogramsof H per cubic meter(Density for Hydrogen is 7.87g/cm3?? Write your answer in Engineering Notation.


        Your Answer =

Part E:

What is the concentration gradient (C/X) in kg/m4?Write your answer as positive to the thousandthplace.


        Your Answer =

Part F:

Calculate the diffusion coefficient, D, in m2/s atthe specified temperature. Write your answer in EngineeringNotation.


        Your Answer =

Part G:

Compute the diffusion flux in kg/m2-s. Write youranswer in Engineering Notation.


        Your Answer =

Answer & Explanation Solved by verified expert
4.1 Ratings (491 Votes)
    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students