# Please calculate the steady state flux of atomic hydrogen, and then calculate the time for dissipation....

###### Question:

Please calculate the steady state flux of atomic hydrogen, and then calculate the time for dissipation.

Problem 1 (2 marks) Estimate the steady-state flux of atomic hydrogen at 25 °C through a steel vessel of wall thickness 4 mm given that its inside surface is kept saturated with hydrogen at a concentration of 4.2 moles m ; the outside surface is exposed to the atmosphere. The diffusivity of hydrogen in a-iron is D. = 0.1 mm ?s?, Q = 13.4 kJ mol?. If the vessel contains 20 moles of hydrogen, estimate the hours taken to dissipate all of the hydrogen given that the vessel has a surface area of 2m². Comment on why it is possible to store hydrogen gas in iron cylinders for much longer periods. How does dissolved hydrogen affect the mechanical properties of a-iron?

#### Similar Solved Questions

##### Are predictions using the supply-and-demand model likely to be reliable in each of the following markets?...
Are predictions using the supply-and-demand model likely to be reliable in each of the following markets? Why or why not? Predictions using the supply-and-demand model for the apple market are likely A. not reliable because consumers have full information about apple prices. B. reliable because appl...
##### What is NO_2 called?
What is NO_2 called?...
##### Step by step solution please A 16-inch gasoline pipe line is transport gasoline at a flow...
Step by step solution please A 16-inch gasoline pipe line is transport gasoline at a flow rate of 200 gallon per minute. Please calculate how much pressure gradient dp/dx is needed, using the N-S equation provided in below? (Hint: Assuming the flow in the pipe line is laminar so you can use the Pois...
##### Computer science questions 13. What is the value of the expression that follows? strcmp ("dog", "dogs");...
computer science questions 13. What is the value of the expression that follows? strcmp ("dog", "dogs"); 0 nosodo none of the above 14. What is the value of the expression that follows? strcmp ("dog", "Dog"); a. -1 e. '10' none of the above 15. Which character...
##### Question 43 You can use a calculator to answer this question - an actual calculator or...
Question 43 You can use a calculator to answer this question - an actual calculator or the calculator on your phone. Either is fine. Use the information in the table below: Base year Base Year 2019 2019 Quantities Prices Quantities Prices Candy Bar 10 $1 20$3 5 $10 8$15 15 $30 20$35 Movie Tickets...