. The activity of silicon in a binary Fe-Si Iiquid alloy containing Ns,= 0.02 is
0.000022 at 1,600"C relative to the Raoultian standard state. The Henrian activity
coefficient ygi is experimentally determinedto be 0.001 1.
1) Calculate the activity of silicon in the same alloy, but relative to the Henrian
2) Calculate the change of the standardmolar free energy of silicon for the change
3) Calculate the activity of silicon relative to the 1wt% standard state. The
standard state.
ofthe standardstatefrom Raoultian to Henrian.
molecularweights ofFe and Si are 55.85 and 28.09, respectively.