Page ? 7. Consider the following phase diagram. a. Label what compounds are pres
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Question
Page ? 7. Consider the following phase diagram. a. Label what compounds are present in each region except the single-phase liquid region), and how many phases those regions have b. Explain the -axis position for the lines labeled Ca Si. Caši, and Cašiz e. Can you determine the melting points of Ca Si, Casi, and CaSi: from this figure? If so, what are they? d. True or False: Casi and Casi: form a eutectic mixture that melts at 1268 ? 1500 Liquid 1314 1324 1300 1268 1100o 1040 1030 700 0.2 0.4 0.6 0.8 Mole fraction of B. X Figure 5.7 The temperature composition diagram for the Ca/Si binary system.Explanation / Answer
a) three compounds are there in three regions except the single phase liquid region,3 phases these regions have Ca2Si,CaSi,CaSi2
b)X axis position for Ca2Si is 0.3-0.5
CaSI is 0.5-0.65
CaSI2 is 0.65-1
c)Melting points of Ca2si is 1314
CaSi is 1324
CaSi2 is 1040
d)YES,
A mixture of two or more substances which melts at the lowest freezing point of any mixture of the components. This temperature is the eutectic point. The liquid melt has the same composition as the solid,THESE two are at same state at that point.
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