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son4ous [18]
3 years ago
14

Calculate the value of D at 575°C for the diffusion of some species in a metal for which the values of D0 and Qd are 4.5 × 10-5

m2/s and 160 kJ/mol, respectively.
Chemistry
1 answer:
GREYUIT [131]3 years ago
4 0

Answer:

The value of D = 4.4 × 10^{-5}

Explanation:

Temperature T = 575 °c = 848 K

D_{0} = 4.5 × 10^{-5} \frac{m^{2} }{sec}

Q_{d} = 160 \frac{KJ}{mol}

The value of D_{0} is given by the formula

D_{0} = D exp   (  \frac{Q_{d} }{RT} )

Put all the values in above formula we get,

4.5 × 10^{-5} = D exp \frac{160}{7050.272}

4.5 × 10^{-5} = D × 1.023

D = 4.4 × 10^{-5}

This is the value of D.

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Specific\text{ gravity = }\frac{density\text{ of substance}}{density\text{ of reference substance}}

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