Netsu Sokutei 

About: Netsu Sokutei is an academic journal. The journal publishes majorly in the area(s): Calorimetry & Thermal analysis. It has an ISSN identifier of 0386-2615. Over the lifetime, 444 publications have been published receiving 1187 citations.

Enthalpies of Sublimation after a Century of Measurement

Abstract: Measurements of sublimation enthalpies and vaporization enthalpies have been made for over a century.1) These measurements are useful for adjusting enthalpies of formation of solids to a gaseous standard state and for evaluating environmental transport properties. Sublimation enthalpies are also useful for studies of polymorphism and predictions of molecular packing in the solid state. Yet despite the longevity in interest in these measurements and the significant technological improvements in instrumentation and assessment of purity, examination of recent data still show significant discrepancies in data published by different laboratories and by different techniques. Agreement between laboratories is often not within the precision cited. It is the objective of this article to discuss some of the reasons responsible for the apparent inaccuracies and disagreement, and to try to provide to the user of this data, the author's opinion of the quality of some of the data generated by the various types of measurements. The opinions expressed are those viewed through the eyes of an individual who has been collecting this data for approximately 30 years and not necessarily of one who has had hands-on experience with all the techniques discussed below. 2. Sublimation Enthalpies of Organic Compounds