x C Calculate The Force of Attract x ttps:lledugenawileyplus.com/edugen/student/

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x C Calculate The Force of Attract x ttps:lledugenawileyplus.com/edugen/student/mainfr.uni ll, F... Mafi Metlo Episod... a As, J w Testing, Evaluation... ment FULL SCREEN MESSAGE MY INSTRUCTOR Practice Question: Vacancies and self-Interstitials II Calculate the fraction of atom sites that are vacant for silver at 596eC. Assume an energy for vacancy formation of 0.63 ev/atom. the tolerance is +/-2% LINK TO TEXT Question Attempts: 0 of 3 used Copyright o 2000-2017 by John Wiley & Sons, Inc. or related companies. All rights reserved

Explanation / Answer

In order to compute the fraction of atom sites that are vacant in copper at 869 K.

As stated in the problem, Qv = 0.63 eV/atom. Thus,

Nc/N=exp(-Qv/kT)
=exp(-0.63/(8.62*10^-5*869))
=2.225 *10^-4
the fraction of atom sites that are vacant for silver at 596°C is 2.225 *10^-4

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