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Unformatted text preview: unmixed solid Au and solid Si. At 636 K G m,Au = 12,600[(1338-636)/1338] = 6,611 J G m,Si = 50,200[(1658-636)/1658] = 30,943 J a. G M = ab = -(0.186 * 30,943 + 0.814 * 6,611) J = -11,140 J b. G M = 0 10.3 Al 2 O 3 , which melts at 2324 K, and Cr 2 O 3 , which melts at 2538K form complete ranges of solid and liquid solutions. Assuming that S m,Cr2O3 = S m,Al2O3 , and that the solid and liquid solutions in the system Al 2 O 3 Cr 2 O 3 behaves ideally, calculate a. The temperature at which equilibrium melting begins when an alloy of X Al2O3 = 0.5 is heated b. The composition of the melt which first forms c. The temperature at which equilibrium melting is complete d. The composition of last-formed solid...
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This note was uploaded on 01/28/2012 for the course EMS 160 taught by Professor Kim during the Fall '11 term at UC Davis.
- Fall '11