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Unformatted text preview: A B x a º L T (a) Label the two-phase fields in the diagram. (b) Let a liquid with the composition indicated by the vertical line on the phase diagram be cooled from the liquid slowly enough to preserve equilibrium. Describe the evolution of the system as it is cooled. Page 1 Engineering 45: Spring, 2000 Midterm Exam (c) Suppose that you are given the assignment of purifying a B-rich solution until it is almost pure B. How would you proceed? Problem 4: (a) Silica glass is a good thermal insulator, while Ag is not (have you ever drunk chilled wine from a silver goblet?). Why? (b) BCC sodium has a higher Debye temperature than HCP sodium. Which of the two phases is likely to be preferred at high temperature? Why? Page 2...
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- Spring '07
- Chemical bond, Cubic crystal system