A container of gas is at a pressure of 3.7 x 105 pa. how much work is done by the gas if its volume expands by 1.6 m3? show your
2 answers:
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Answer:
Diffusion time is 7.42 h
Solution:
As per the question:
Temperature, T =
Surface concentration of arsenic,
Surface concentration below Silicon surface,
D =
x =
Initial concentration at t = 0,
Now, by using Flick's second eqn:
Thus by putting appropriate values:
(1)
Now,
Now, from error function values tabulation:
For z = 2.0, erf(z) = 0.998
For z = 2.2, erf(z) = 0.995
Now,
With the help of linear interpolation method:
z = 2.12
Now, using eqn (1) and above value:
= 26700 s
t =