A degenerate eutectic system goldsilicon

The Au-Si eutectic phase diagram is characterized by negligible solubility of A(gold) in B and of B (silicon) in A. The single-phase a and P regions in Fig. 8.10 disappear and points j and l are displaced to their respective temperature axes. Fig. 8.11 shows the gold-silicon phase diagram, which is a prototypical degenerate eutectic system. As shown in the following example, information regarding the nonideality of the liquid phase can be garnered from analysis of the liquidus lines in the phase diagram.

Example: Calculate the activity coefficients of the two components in the liquid phase along the two liquidus curves in Fig. 8.11. Is regular solution theory obeyed? Show that the data are consistent with the Zeroth Law of thermodynamics.
Getting Started With Solar

Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

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