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April 25, 2014

Homework Help: chemistry

Posted by Anonymous on Friday, December 14, 2012 at 4:19am.

You have two specimens of copper, both of them polycrystalline. Specimen A has an average grain size of 3.091 μm, while Specimen B has an average grain size of 7.777 μm. Which specimen will silver diffuse through more quickly? Choose the best explanation:


Assuming both specimens are at the same temperature, the diffusivity should be the same through both samples as it is a materials property.

Specimen A should allow silver to diffuse more quickly due to its smaller grain size and increased grain boundary area.

Specimen A should allow silver to diffuse more quickly due to its smaller grain size and decreased grain boundary area.

Specimen B should allow silver to diffuse more quickly due to its larger grain size and decreased grain boundary area.

Specimen B should allow silver to diffuse more quickly due to its larger grain size and increased grain boundary area.

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