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Thermodynamicist’s Progress t first glance, relating thermodynamics to “Pilgrim’s Progress”
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doesn’t seem to make much sense. But on deeper reflection, numerous intellectual values can be seen to be held in common. Both achieve their objectives through symbology. Both can be understood and appreciated on any of several levels of profundity. And some of the allegorical symbols used in “Pilgrim’s Progress’’ so many years ago can be used today without change to represent thermodynamic properties or relationships. Thermodynamics is on our minds this month because in this issue we begin publishing the papers from the Symposium on Applied Thermodynamics held in Washington, D. C., last June. But there is another aspect of the subject that is occupying our attention. What discipline means more to chemical engineering and physical chemistry than thermodynamics? What discipline penetrates into more phases of our technical activities? We would be hard pressed to find one that could move thermo from its central position. Yet thermo is not “in,” although a few segments of it are for some groups of people. Is this because thermo is so well developed that we have reached “Predictive Understanding,” analogous to Christian’s objective of Zion? We don’t think so. I s it because thermodynamics is no longer essential? Again we don’t think so. Rather, we think thermodynamics has become well enough developed that to follow the thermodynamicists along their road to better understanding is hard work these days. The simpler levels of understanding are well cultivated. We are traveling through complex, heavily mathematical considerations that have not been fully developed and are, therefore, unwieldy and hard to use for practical purposes. Therefore, we promise you some challenging reading over the next few months as the symposium papers appear in our pages. We trust that you will find the reward worthy of the effort required. And for a few moments of relaxation, try to find the landmarks on Christian’s travels that we have used on the cover this month. Here’s a clue: Entropy has to be The Slough of Despond.
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VOL. 5 9
NO. 9
SEPTEMBER 1967
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