Recherches sur les propriétés physiques de quelques composés organiques

Berthoud, A.; Brum, Rafaela Prezzi

doi:10.1051/jcp/19231924200143

Cited by 3 publications

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“…Surface tension (-y = 0.352 -6.9 X 10-3 1'7 13 ) -------------------_ Elhylethy";anthate _________________ , 34.78 --------------------------- --------------1"----- 35.31 34.34 33.37 32040 31.43 30.46 29.49 Methyl 3-methyl-1 ,l-cyclohexane- 32.94-32.10 31.26 30.43 29.59 28.75 27.91 44 32.51 31.59 30.66 29.74 28.81 27.89 Ethyllrans-dccahydro-2 ,2-naphthalene- Ji .71 26.77 I-----~----~----,-----,-----~----,_----~----~----- Chiorine trifluoride [10] (Capilian-Rise Method-V)…”

Section: ° 40° 50°mentioning

confidence: 99%

The Surface Tension of Pure Liquid Compounds

Jasper

1972

Journal of Physical and Chemical Reference Data

1,199

574

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The 5urface len,ion table;; presented herein nr(; the result of a literature ;;urvey, evaluation. and compilation of data of "ome 2200 pure liquid compounds. 226 of which were reported for u sin;:;:]e temperature. Theel" are arranged with related compound. in the increasing order of their molecular weight". As far as possible the method of measurement. nature of atmosphere to whieh the liquid was expo~ed during mea!'llrenH'nt", and the e';limate.,] a('euracy are given for eaeh 1i(luid. The tabulated ,-alue" were eslculated from the derived results of directly measured quantities reported in the literature of many cQuntriee from ahout 18'/<1 to 1969. Preliminary plots of the experimentally m~a~ured-;Juantities indicated that the ""rfllce tension, of the liquid com• pounds are linear Innctions of the temperatnre over the reported oper8lional range. The prinf'jplt' of least ~quares WJ:H' applied to experimental surfare tcmion ,'aluee to ef'tahlish the regression <,unes and their equation,. The constants of the equatiollF (slope and intercept), together with the standard deviations aTe given for each ('ompOlmd. The selection factors eSlablishinl' criteria of qualhy of 811rfa~e leIJ~ioIl datu C:trt' uj~cu!:;~~u. Tlc.t:~t" judwh: (it) UJt:'lLwl vI JlJeu~uct"[J1(':Ht, (b) purity of compound, (e) quality of apl'aralus and ai;sernhJ;--, (d) experimental procedure (experi. mentation), (e) rcHahility oj mCSl;urement" (mOEt probable yaluee), (f) experience of inYe,;tiI'8toT, and (g) availabilil;.-of data. There are 27•1. references listed alphabetically.

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Section: ° 40° 50°mentioning

confidence: 99%

The Surface Tension of Pure Liquid Compounds

Jasper

1972

Journal of Physical and Chemical Reference Data

1,199

574

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“…For the difference of the coexistence densities, Goldhammer (65), using Young's experimental measurements for twelve polar and nonpolar compounds, proposed the expression Pri ~Prv = (1 ~TR)V3 (9) The sum of eq 8 and 9 yields, for the reduced density of saturated liquids, the expression…”

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Saturated liquid densities of polar and nonpolar pure substances

Campbell¹,

Thodos²

1984

Ind. Eng. Chem. Fund.

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Experimental information available in the literature for the density behavior of the saturated liquid state of 46 nonpolar and polar substances has been modeled according to the expression, pR = 1 + a( 1 -T,)"' + p( 1 -T,)" , in which pR is the ratio of the density at reduced temperature T , to the critical density. This relationship has been found to apply over the complete range between the triple point and the critical point. Exponent rn is a universal constant (rn = I*). The critical constants and normal boiling points are needed to establish a, p, and n for nonpolar substances. For polar substances, the dipole moment is also required. Saturated liquid densities calculated with correlated values of a, p, and n have been compared with corresponding experimental measurements to yield an overall average deviation of 0.83% (4284 points) for the 46 substances used in this development. This generalized treatment has been applied to 16 additional substances to yield for them an average deviation of 1.14 % (669 points).The ability to predict saturated liquid densities for elements and compounds continues to play an important role in the treatment of thermodynamic properties. Although the calculation of such densities is possible through the use of an equation of state more often than not, the calculated saturated densities are not in good agreement with corresponding experimental measurements. Rather than relying on an equation of state to calculate saturated liquid densities, it is perhaps more expeditious to utilize a relationship that applies directly to the saturated liquid state. Early attempts express the dependence of density in the form of first, second, and third degree polynomials in temperature (82). Although the form of such relationships proves satisfadory for temperatures approaching the normal boiling point, it does not accommodate the density behavior at higher temperatures, particularly near the critical point.Riedel (161) presented a generalized relationship for the reduced saturated liquid density in terms of reduced temperature as follows PR = 1 + 0.85(1 -TR) + (0.53 + 0.2ac)(1 -TR)"3 (1) Equation 1 is applicable to nonpolar and nonassociating polar liquids between their triple points and critical points. The Riedel factor, a, = (d In PR/d In TR)TR=l.oo, has been shown by Reid and Sherwood (160) to relate to the Pitzer acentric factor, w , as follows (2)Thus, by substitution, eq 1 may be expressed in terms of w through the relationship w = 0.2O3(ac -7.00) + 0.242Equation 3 is somewhat more convenient to apply than eq 1, since values of w are more accessible than corresponding values of ac.Yen and Woods (222) investigated the density behavior of 62 pure compounds, whose critical compressibility factors range from z, = 0.21 to z, = 0.29, and proposed the relationship /JR = 1 + A(1 -TR)'I3 + B(1 -TRI2l3 + D(1 -TR)4'3where A , B, and D are given as third-order polynomials in 2,. These investigators reported an average deviation of 2.1% (693 points) for the 62 substances.

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Zweiter Teil

Klemenc¹

1948

Die Behandlung Und Reindarstellung Von Gasen

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Recherches sur les propriétés physiques de quelques composés organiques

Cited by 3 publications

References 0 publications

The Surface Tension of Pure Liquid Compounds

The Surface Tension of Pure Liquid Compounds

Saturated liquid densities of polar and nonpolar pure substances

Zweiter Teil

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