The Vapor Pressure of Hydrates, Determined From Their Equilibria With Aqueous Alcohol.

Abstract

with definit acidic and basic properties, it is not a t all strange that the heat of neutralization should vary considerably from solvent to solvent. Summary. I. Measurements of heats of reaction in non-aqueous solutions have been made and reported for the first time. 2. The amount of heat liberated for a given reaction in different solvents has been found to vary greatly from solvent to solvent. 3. These considerable differences cannot be explained as being due to any electrolytic dissociation of the acetate, nor are they due to differences in the heats of solution of the acetate in the different solvents. 4. The chemical nature of the solvents does not seein to give any clue as to the magnitude of the heat of neutralization in the cases investigated, nor of the magnitude or sign of the heat of solution of the resulting acetate. It is proposed to continue this line of work, using such other reactions as may be found available.

Determination of goslarite–bianchite equilibria by the humidity-buffer technique at 0.1 MPa

“…Other reported locations for this invariant point include the solid diamond at 7.5 8C and 45.5% RH (Bonnell and Burridge, 1935), the open diamond at 21.5 8C and 51.6% RH (Copeland and Short, 1940), and the open triangle with the apex pointing down at 22.5 8C and 56.7% RH (D'Ans et al, 1957). The goslarite-bianchite equilibria data obtained from vapor-pressure measurements at 25 8C are shown by the filled large triangle with the apex pointing up (Frowein, 1887), the filled hexagon (Lescoeur, 1889), the filled triangle with the apex pointing down (Foote and Scholes, 1911), the open large triangle with the apex pointing up (Schumb, 1923) and the open square (Ishikawa and Murooka, 1933). Those between 10 and 25 8C are shown by the open circles (Bonnell and Burridge, 1935), those at 21.5 and 39 8C by the open diamonds (Copeland and Short, 1940), and those between 25 and 35 8C by the plus signs (Bell, 1940).…”

“…1. Vapor-pressure measurements were made at 0.1 MPa and 25 8C by Frowein (1887), Lescoeur (1889), Foote and Scholes (1911), Schumb (1923) and Ishikawa and Murooka (1933), between 10 and 25 8C by Bonnell and Burridge (1935), between 21.5 and 39 8C by Copeland and Short (1940), and between 25 and 35 8C by Bell (1940). Thermodynamic data derived from calorimetric and vapor-pressure measurements for goslarite and bianchite were evaluated and compiled by Wagman et al (1982) and DeKock (1982), and the goslarite-bianchite phase boundaries based on these data are shown in Fig.…”

“…Published experimental data for the equilibrium relative humidity (RH) associated with goslarite and bianchite at 25 8C span a range from approximately 55% to 65% (Frowein, 1887;Lescoeur, 1889;Foote and Scholes, 1911;Schumb, 1923;Ishikawa and Murooka, 1933;Bonnell and Burridge, 1935;Bell, 1940). Estimates of RH calculated from published thermodynamic data range from approximately 65% to 80% (Wagman et al, 1982;DeKock, 1982).…”

Thermodynamic properties of { C2H5OH+(1− )H2O} in the temperature range from 320 K to 420 K at pressures up to 200 MPa

“…The properties for aqueous mixtures of ethanol have been measured by many investigators. The isothermal (vapour + liquid) equilibrium measurements have been reported in the moderate temperature range, between 283 K and 363 K, in 12 papers, (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) and in the high temperature range, above T = 423 K, in two papers. (13,14) The isobaric (vapour + liquid) equilibrium measurements have been reported in the low pressure range, below 101 kPa, in one paper, (15) at atmospheric pressure in eight papers, (16)(17)(18)(19)(20)(21)(22)(23) and in the high pressure range, up to 0.96 MPa, in one paper.…”

Breathalyzer® Tests with the Equilibrator and the Effect of room Temperature

“…:; Smith & Weston (Canada) Ltd., Mississauga, Ontario -Part Number 003-0007-000. 6 Breathalyzer readings in this paper are expressed in the units: mg alcohol per 100 mL blood, or as abbreviated: mg%. Using an equation derived in this manner, partition ratios for all temperatures in the 15-40 Q C range were calculated.…”