Question

A specimen of LaNi5 containing hydrogen is placed in a vacuum furnace. After 1 hour, at what depth from the surface of the specimen has the concentration of hydrogen reached 1/3 the initial concentration?
The diffusion coefficient of hydrogen in the alloy has a value of 3.091*10-6 cm2/s. Assume that the initial concentration of hydrogen is uniform throughout the specimen and that the concentration of hydrogen is maintained at zero in the vacuum furnace.
DATA: Error Function Values (given without regard as to whether you need these data to solve the problem) for values of z less than 0.6, use the aproximation erf(z) = z; erf(1.0) = 0.843; erf(2.0) = 0.998
Express your answer in units of cm:

Answer 1

0.0703

Answer 2

Dear Cheunology, can you please make me understand on how to solve this problem. in detail????