Analytic representation of vapor-pressure curves for pure substances in terms of conic sections

✍ Scribed by S. Waldenstrøm; R. Stølevik

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 663 KB
• Volume: 73
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(80)80387-3

✦ Synopsis

The hypotheses that the drmensronless quantrty @ = 7$ d (In P))dT,, where P is the saturation pressure and T, the reduced temperature, can be represented analytically by a conic sectron. leads us. by integratron of Ciapeyron's equation, to a new class of vapor-pressure relatrons. the fnal sermreduced form contams at most SIX constants (mcludmg the rntegration constant) WI& surtably chosen conic sectrons, tabulated vapor-pressure data for hqutds can be reproduced with hrgh accuracy over the entire hqutd range; exphctt results are grven for a selection of twelve compounds, contammg quantum, polar, and normal hqmds.