ABSTRACT
Introduction .......................................................................................................... 59
Phase and State Diagrams.................................................................................. 61
The Ideal........................................................................................................ 61
The Reality .................................................................................................... 63
Determining the Diagram........................................................................... 65
Limitations to Measurement .............................................................. 66
Calorimetric Techniques ............................................................................. 67
Mechanical Measurements ......................................................................... 71
Electrical Measurements ............................................................................. 73
Relaxational Spectroscopy .......................................................................... 74
Conclusion ............................................................................................................ 75
References ............................................................................................................. 75
While the title for this presentation is quite clear, it is appropriate to provide
an alternative title, which more clearly indicates the general direction that I
propose to take in addressing the issues. This alternative title is “How do we
locate the boundaries within our state diagrams, and what might they
represent?” This alternative title is particularly appropriate for this meeting,
because the utility of state diagrams in understanding the behavior of
aqueous systems has been a continuing theme over many ISOPOW
conferences. In order to address the topic, we must first recognize that
there are two distinct scenarios that have to be considered. These are the
scenario appropriate to a system at thermodynamic equilibrium, and the
scenario appropriate to a system under kinetic constraint.
