Unformatted text preview: normal melting temperature of Cr 2 O 3 is 2538 K, and it can be assumed that the S m,Al2O3 = S m,Cr2O3 . 9.2 When 1 mole of argon gas is bubbled through a large volume of an Fe-Mn melt of X Mn = 0.5 at 1863 K evaporation of Mn into the Ar causes the mass of the melt to decrease by 1.50 g. The gas leaves the melt at a pressure of 1 atm. Calculate the activity coefficient of Mn in the liquid alloy. 9.3 The variation, with composition, of G XS for liquid Fe-Mn alloys at 1863 K is listed below. a. Does the system exhibit regular solution behavior? b. Calculate G XS Fe and G XS Mn at X Mn = 0.6. c. Calculate G M at X Mn = 0.4. d. Calculate the partial pressure of Mn and Fe exerted by the alloy of X Mn = 0.2....
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- Fall '11