Showing papers in "The Journal of Chemical Thermodynamics in 1976"

TL;DR: In this paper, the results of measurements of liquid densities within the temperature range 293 to 490 K were presented for highly pure samples of n -alcohols C1 to 5, 8 and 12, and of propan-2-ol and butan 2-ol. The results were considered to have an accuracy of ± 0.15 kg m −3 over this range of temperature.

TL;DR: In this article, the enthalpies of solution in water of D 6 -benzene, toluene, ethylbenzenes, propylbenenzene, and cyclohexane have been determined in the temperature range 288 to 308 K by a flow-microcalorimetric technique.

TL;DR: In this paper, the dielectric constants of water + acetonitrile have been measured from 30815 to 27815 K over the entire composition range and deviations from ideality have been determined; they are mostly positive and show two maxima and one minimum Derived properties have been calculated: molar polarization, correlation factor of mixtures, and dipole moments of both components using the Mecke-Reuter treatment.

TL;DR: The Picker flow calorimeter was used to determine the molar heat capacities of ethanol, n-propanol, benzene, ethylbenzene, cyclohexane, and tetrachloromethane at 298.15 K relative to n -heptane (N.B.S. standard sample) as discussed by the authors.

TL;DR: In this paper, a simple additivity scheme is derived for the partial molar heat capacities of non-ionic compounds in infinitely dilute aqueous solution at 298.15 K. The effects of branching and cyclization are compared with experimental results.

TL;DR: In this article, the Picker flow calorimeter was used to determine the excess heat capacity of non-electrolytes at 298.15 K with a precision of ± 0.02 J K−1 mol−1 for CpE.

TL;DR: In this paper, the vapour pressures of methyl propyl, isopropyl methyl, butyl methyl and decyl methyl were measured at pressures up to 205 kPa. The measured values were fitted by Antoine and by Chebyshev equations.

TL;DR: In this paper, the isothermal compressibility, specific volume, and the dependence of each on pressure have been determined for several organic alcohols, alkanes, and alkenes by analytical ultracentrifugation.

TL;DR: In this paper, the enthalpies of solution in water at infinite dilution have been determined at 298.15 K for formamide, N -methylformamide, acetamide, and t -butanol.

TL;DR: In this paper, the authors presented new experimental vapour pressures of oxygen for the temperature range from 90 K up to the critical temperature Tc = 154.581 K. This equation, which contains only five coefficients, correlates the selected data set within their experimental accuracy and gives essentially different results from previous vapour-pressure equations for oxygen.

TL;DR: In this paper, the initial hydrate formation conditions for pure isobutane along the hydrate-water liquid-isobutan liquid locus and for 10 mixtures of methane and isobubane covering a composition range from 0.23 to 63.6 moles per cent of isobobane along with the four-phase hydrate water liquid isobutanobane liquid-vapor quadruple locus were obtained from pure liquid and vapor phases.

TL;DR: In this paper, the heat capacity of purified natural marcasite has been determined by adiabatic-shield calorimetry in the region 5 to 700 K where it transforms to pyrite exothermically.

TL;DR: In this article, a precision differential flow calorimeter for the measurement of enthalpies of mixing of liquids has been constructed for benzene + cyclohexane, which has been made at temperatures between 28015 K and 39315 K. The standard deviation of the 29815 K measurements is 021 J mol −1, and agreement with the results of best isothermal dilution calorimeters is excellent

TL;DR: In this paper, a comprehensive experimental investigation of the isothermal and isochoric p, V, T surfaces of pure ethylene (99.997 moles per cent) was conducted with an overall accuracy from 0.03 to 0.08 per cent in the ratio pV T, were used to derive vapor pressures, critical constants (ϱc = 7.635 mol dm−3, pc = 5.04197 MPa, To = 282.35 K), p, T, ϱ relations for the vapor and liquid branches of the coexistence envelope

TL;DR: In this paper, the heat capacities of pure compounds at infinite dilution in water at 293.15, 298.15 and 303.15 K were determined using a drop calorimeter.

TL;DR: In this article, the freezing and melting of two solid phases of CCl 4, one metastable and the other stable, have been studied using an adiabatic calorimeter.

TL;DR: In this article, it was shown that the aromatic solvents and carbon tetrachloride interact with the free OH groups on the monomeric alcohol and terminal ǫOH groups of linear hydrogen-bonded chains.

TL;DR: In this paper, mixing calorimetry has been used to determine the excess enthalpy HE as a function of composition for liquid mixtures of nitrogen + methane at 91.5 and 105.0 K. Good agreement is found between the present results and a number of other recent studies.

TL;DR: In this article, the heat capacities of LaCl 3, PrCl 3, and NdCl 3 have been measured from 5 to 350 K by adiabatic calorimetry.

TL;DR: A flow calorimeter incorporating a stirrer for measurements of the excess enthalpies of liquid mixtures has been constructed in this article, and it has been tested on benzene + cyclohexane and has been used to make measurements at 298.15 K.

TL;DR: In this article, the heat capacity of pure methane and samples doped with about 0.8 percent of oxygen as a spin-species conversion catalyst was measured for both pure and pure gaseous methane.

TL;DR: Partial molar heat capacities of simple electrolytes and non-electrolytes in H2O and in D2O were reported in this article, where it was observed that simple electrolyte heat capacities are smaller than the pure substances while the opposite is true for sugars and polyhydric alcohols.

TL;DR: In this paper, the vapour pressure of liquid ammonia was measured with high accuracy; 16 values were obtained for temperatures between 328 K and the critical temperature, T c = 405.5 K. The results together with the very accurate measurements, reported by Cragoe et al. (4) for temperatures below 343 K, form the basis of a new vapour-pressure equation.

TL;DR: In this paper, the Gibbs energies, enthalpies, and entropies of Fe2Mo, Fe3Mo2, and molybdate FeMoO3 in the temperature ranges of investigation were obtained.

TL;DR: In this article, a capacitance manometer is used as a null device to isolate the liquid and vapour, and the vapour pressure is measured with a precision mercury manometer.

TL;DR: In this paper, the vaporization of o-, m-, and p-dinitrobenzenes was investigated by means of the torsion-effusion method and the selected equations for vapour pressure p as a function of temperature T are: o-dinternzene: log 10 (p atm )=(7.03±0.34)−(4270±120) K T,m-drinzene, log 10 p atm ),=(766±0.,28)− (4400±100) KT,

TL;DR: In this paper, the liquid-liquid phase equilibria in the binary systems CHF3 + C2H6, CF4 + C 2H6 and CHF 3 + CF4 have been measured in the temperature range 120 to 220 K and at pressures up to 170 MPa.

TL;DR: In this article, the standard enthalpies of formation of UCl4 and UO2Cl2 were derived, and the results were as follows: ΔH f o (s, 298.15 K)/kcal th mol −1 UCl 4 −(243.3 ± 0.7)

TL;DR: In this paper, the enthalpies of reaction of CaUO4 and γ-UO3 with approximately 3 mol dm−3 HNO3 were determined, and they were −(130.7 ± 1.1) and −(75.5 ± 0.7) kJ mol−1, respectively.

TL;DR: In this article, the enthalpies of combustion of five diazenes and enthalphies of vaporization of nine DIAzenes have been measured, and the experimental results yield values of the enthemies of formation for the condensed and gaseous states of these compounds: di-n-propyldiazene, di-i-pro pyldiazenes; di-t-butyldiazen; t-butyl(1,1,3,3-tetramethylbutyl)diazene; 1