Question

A liquid Fe-P alloy containing 0.65 wt.-% phosphorus is equilibriated with a H₂O-H₂ mixture in which PH₂O/PH₂ is equal to 0.0494 at 1600°C. The equilibriated alloy is found to contain 0.116 wt.-% oxygen. The activity coefficient fo^o of oxygen relatively to the infinitely dilute, weight percent standard state in Fe-O binary alloys at 1600°C is represented by logf_o^o = - 0.2 [wt.-% O].

Calculate the interaction parameter e_o^P at 1600°C if the equilibrium constant of the reaction:

H₂(g) + [O]Fe,wt-% = H₂O(g) at 1600°C is 3.855

Answer 1