The Region of Critical Solution of Binary Liquids, Evidence for an Anomalous First-Order Transition in the System Triethyl Amine-Water

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Abstract
The change of fugacity with composition has been investigated in the liquid system triethyl amine‐water in the temperature region adjacent to the temperature of critical solution. It has been shown that within experimental error this change is zero for a range of at least 5°C on the one phase side, and for compositions of liquid between 20 and 50 weight percent. This is taken to be evidence for the existence of a range of anomalous first‐order transition adjacent to the critical temperature. Values of change of fugacity with composition have been determined sufficiently precisely to be in definite disagreement with simple conclusions drawn from the concept of the continuity of states.
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