MSE 2001 H Homework Chapter 4 February 15, 2008 Seung Soon Jang 1. Among various types of defects, _______________________ is defined as an imperfection that involves a few atoms at most. 2. Please specify the type of defects for the followings. __________________ __________________ 3. The following figures show a perfect crystal and an imperfect crystal with one defect. Please explain why the crystal structures in nature allow such defects to a certain extent. And if we assume that the each lattice is unique and distinguished from others, what is the difference of entropy between the perfect crystal system and the system with one vacancy? 1
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