Fit for the Antoine constants A B C for the data above for w

Fit for the Antoine constants (A, B, C) for the data above for water, using a nonlinear fit (e.g., in Excel). Compare with A, B, C from the tables in the class notes. answer: A = 16.361, B = 3878.833, C = 229.878 (table give 16.3872, 3885.70, 230.170)

Solution

The phase diagram represents eutectoid alloy A + B having maximum terminal solid solutions w_alpha = 4.9 wt%A and w_beta =97.5 wt%A. A 100 gram sample of hyper eutectoid alloy composed of A+B, is slowly cooled from the fully gamma phase to room temperature. Analysis determines the sample contains 26 grams of the terminal phase in the pro- form and 17 grams of the terminal phase in the eutectoid form. Determine the wE, eutectoid composition, in wt%A.