Vapor Pressure–Temperature Data on Some Organic Compounds

Abstract

Four tables are given listing the determined boiling point at 760-mm. pressure and seven lower pressures and a table listing the infinite points of 23 Cox chart families.THE present investigation was inaugurated a number of years ago when it became necessary to know the barometric boiling point of the forward flow on styrene fractionating columns. In order to do this a table of vapor pressure-temperature relations was developed and this required an accurate knowledge of at least two boiling points at their respective pressures. It became necessary to set up Cox chart families, and for this purpose data on at least three compounds of the family were required.The only families for which these data were available in the required accuracy were the aliphatic hydrocarbons, benzene hydrocarbons, cyclohexanes, and cyclopentanes. The data on these were determined by the Bureau of Standards (3). In order to set

Thermochemistry of substituted benzenes: quantification of ortho-, para-, meta-, and buttress interactions in alkyl-substituted nitrobenzenes

“…Determinations of the vapor pressure of methyl-and ethylnitrobenzenes have been made by a number of groups (16)(17)(18) using ebulliometry in the temperature range close to the boiling temperature. Values of the parameters of the Antoine vapor pressure equation…”

“…are available in the literature (16)(17)(18) and in a compilation. (19) We have attempted to assess the values of g l H o m at T = 298.15 K of alkylnitrobenzenes with the help of the equation: (20) …”

“…The missing enthalpy of vaporization of this compound was estimated with (4). Since the boiling temperatures of 4-methylnitrobenzene (T fus = 506.40 K) (16) and 3-methylnitrobenzene (T fus = 505.80 K) (22) are very close, it was reasonable to assume an equality of their enthalpies of vaporization. Thus, the value g l H o m = (62.3 ± 2.1) kJ · mol −1 , adopted for 3-methylnitrobenzene was used for the calculation of its standard molar enthalpy of formation, f H o m (g) = (30.8 ± 3.9) kJ · mol −1 , required for the estimation of the interactions of substituents in alkylnitrobenzenes.…”

Recommended vapor pressures for aniline, nitromethane, 2-aminoethanol, and 1-methyl-2-pyrrolidone

“…Arc representation of vapor pressure data for nitromethane. , Williams [29]; , Hodge [30]; , Jones and Giauque [31]; , Halban [32]; , Dreisbach and Shrader [33]; , Holcomb and Dorsey [34]; , McCullough et al [35]; , Toops [36]; , Addison and Sheldon [37]; , Berman and West [38]; , Khurma et al [39]; , Teodorescu et al [40,41];, Dragoescu et al [42]. …”

Standard partial molal properties of aqueous alkylphenols and alkylanilines over a wide range of temperatures and pressures

“…All conversions between c Rµ and k H were performed by us using the vapor pressures reported by Dohnal and Fenclova (1995) for phenolic compounds and by Censky (2001) for solutes with the amino group. The vapor pressure data for this latter group of compounds were obtained by combining the new static measurements (Censky, 2001) with the literature data (Dreisbach and Schrader, 1949;McDonald et al, 1959;Krevor et al, 1985;Steele et al, 1994). They were correlated by the Cox equation as a function of temperature simultaneously with the ideal gas and liquid heat capacities (Frenkel et al, 1994;Zabransky et al, 1996) in order to provide a realistic extrapolation of vapor pressures towards ambient temperatures.…”