Calculate the value of the diffusion coefficient D (in m2/s) at 547°C for the diffusion of some species in a metal; assume that the values of D0 and Qd are 5.6 × 10-5 m2/s and 177 kJ/mol, respectively.

Answer : The value of diffusion coefficient is,

Explanation :

Formula used :

where,

D = diffusion coefficient = ?

=

=

R = gas constant = 8.314 J/mol.K

T = temperature =

Now put all the given values in the above formula, we get:

Thus, the value of diffusion coefficient is,

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the answer would be a