The (solid+vapor) equilibrium. A view from the arc

Abstract

Data sets, from a variety of investigations, on the vapor pressures of the reference materials naphthalene, ferrocene, benzoic acid, and benzophenone, are combined in explanatory graphical representations, which subsequently, are used to draw conclusions about the possibilities and limitations of vapor pressure measurement and the determination of enthalpies of sublimation. #

Assessment of vapor pressure data of solid metal carbonyls

“…The Oonk methodology described here refers to the procedure of critical assessment of vapor pressure data as proposed by Oonk et al [3], utilized and refined in further assessments [4][5][6][7][8]. The first step is to define a function given below:…”

“…Such information is invaluable when a pre-screening of all the available data is desired to design new experiments or to determine if any measurements have to be reproduced. The power of OAR is the ability to predict important sublimation or vaporization properties of substances just from the characteristics of the arc [3][4][5][6][7][8]. A manual arc can be drawn through the transformed data and the thermodynamic sublimation properties can be determined from the arc dimensions.…”

“…The vapor pressure of Os 3 (CO) 12 has been measured by Gaidym et al [20] who reported only as a regression equation and is given below: [7] Cr(CO) 6 312 to 400 Heiber and Romberg [15] Cr(CO) 6 315.95 to 410.65 W(CO) 6 338.75 to 427.05 Mo(CO) 6 326.45 to 419.85 Lander and Germer [2] W(CO) 6 301.25 to 308.35 a Mo(CO) 6 291.65 to 308.35 b Rezukhina and Shvyrev [14] Cr(CO) 6 319.27 to 411.57 W(CO) 6 338.76 to 410.13 Mo(CO) 6 323.68 to 402.77 Cordes and Schreiner [16] Cr(CO) 6 300.8 to 315.5 Boni [17] Cr(CO) 6 274 to 310.7 Baev et al [13] Cr(CO) 6 316.05 to 427.15 W(CO) 6 347.75 to 431.65 Garner et al…”

“…The first step involves screening of the vapor pressure data using the OAR. This representation has certain inherent advantages over the traditional ClausiusClapeyron (CC), ln P versus 1/T plots [3][4][5][6][7][8]. These are discussed in section 2.…”

Thermodynamic properties of glycerol: Experimental and theoretical study

“…1is not informative enough. More detailed insight in the quality of vapor pressures measured with different methods [14,[16][17][18][19][20][21][22][23][24][25] can be obtained from the "arc representation" developed by Oonk et al [26][27][28].The main idea of this approach is to collect all available data in a possibly broad temperature range and to approximate vapor pressures at the beginning and the end of the temperature range with the linear equation.…”