THE VAPOR PRESSURE OF AMMONIA.<sup>1</sup>

Cragoe, C. S.; Meyers, Cyril H.; Taylor, Cyril S.

doi:10.1021/ja01447a003

Cited by 28 publications

(8 citation statements)

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“…The systematic difference between the data set of Cragoe etal. [32] and that of Overstreet and Giauque [ 18] is evident. The extrapolated values are generally located between both sets of measurements, but the present results suggest that the values of Cragoe et al [ 32 ] at temperatures below 220 K could be slightly too low.…”

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 83%

“…[32] and that of Overstreet and Giauque [ 18] is evident. The extrapolated values are generally located between both sets of measurements, but the present results suggest that the values of Cragoe et al [ 32 ] at temperatures below 220 K could be slightly too low. The extrapolated values are also slightly lower than the fundamental equation of state established by Tillner-Roth et al [ 12] used for the baseline.…”

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 83%

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A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Tillner‐Roth

1996

Int J Thermophys

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A new method is presented to extrapolate experimental vapor pressures down to the triple point. The method involves a nonlinear regression analysis based on the Clausius-Clapeyron equation and a simple relation for the enthalpy of vaporization. Triple-point pressures and vapor pressures up to 0.1-0.2 MPa are estimated for R125, R32, R143a, R134a, R152a, R123, R124, and ammonia; they generally agree with available experimental data within their uncertainty. Equations for the enthalpy of vaporization which describe this property fairly well at low temperatures are obtained as a byproduct.

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Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 83%

Section: Vapor Pressures and Entlmlpies Of Vaporization Of Refrigerantsmentioning

confidence: 83%

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Tillner‐Roth

1996

Int J Thermophys

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“…Figure 7A shows the gelling behavior of ISOBAM-104/TAC system at different gelling temperatures. Due to the vapor pressure of water and NH 3 at 80 • C is about 2.4 times than that of 60 • C, 33,34 it was hard to get a complete green body at 80 • C. Thus, gelling temperatures higher than 60 • C were not appropriate for the ISOBAM-104/TAC system. Compared to 20 • C, the gelation rates at 40 and 60 • C had been significantly improved.…”

Section: Mechanism Researchmentioning

confidence: 99%

Aqueous alkaline suitable gel system and related mechanism for highly transparent La_0.4Gd_1.6Zr₂O₇ ceramic preparation

et al. 2021

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In this work, a fabrication route combined optimized ISOBAM-104/TAC gelcasting (where TAC refers to triammonium citrate) and one-step sintering technology was developed to prepare highly transparent La x Gd 2-x Zr 2 O 7 (LGZO) ceramics. The gelling behavior in an alkaline environment was investigated, and the corresponding mechanism was systematically proposed for the advanced spontaneous gel system. The starting materials after ball milling were directly shaped into green bodies without any treatment, and high-quality LGZO ceramics were obtained by three-stage debinding and one-step sintering. The in-line transmittance of these ceramics reaches 74% at 1100 nm, which is about 95% of the theoretical value. This work not only establishes an efficient method to fabricate LGZO ceramics in large and complex shapes but also elucidates the gelling mechanism in alkaline, which expands the application of gel-casting technology in transparent ceramics.

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“…•, Giauque and Wiebe (16) ; 9, ammonia: •, Beattie and Lawrence (69) ; +, Baehr et al (70) ; ♦, Cragoe et al (71) ; , Overstreet and Giauque (26) ; , Streatfeild et al (72) ; 10, benzene: •, Ambrose (73,74) ; +, Golding and Machin (75) ; 11, water: •, Sato et al (76) ; 14, carbon monoxide: •, Michels et al (77) ; +, Clayton and Giauque (78) ; 15, oxygen: •, Wagner et al (79) ; +, Hilsenrath (80) ; 16, hydrogen sulphide: •, Kay and Rambosek (81) ; +, Clarke and Glew (82) ; ♦, Giauque and Blue (83) .…”

Section: Vapourizationmentioning

confidence: 99%

Phase equilibria from the exactly integrated Clapeyron equation

Lobo

Ferreira

2001

The Journal of Chemical Thermodynamics

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In this work, the exactly integrated form of the Clapeyron equation found by Mosselman et al. has been used in a systematic manner to derive a comprehensive set of equations describing the first-order transition curves of pure substances. The application of each of these equations requires the knowledge of only one (reference) point on the particular equilibrium line, of the corresponding enthalpy of transition, and some ancillary data (molar volumes and heat capacities of the phases at equilibrium). No fitting to ( p, T ) experimental data is needed. In this respect the equations developed here can be regarded as a source for calculating a priori the phase equilibrium curves. The results have been tested for a number of selected pure substances of variable molecular complexity, and the uncertainties attached to the calculations have been assessed. Empirical equations currently used for first-order transitions are compared with those obtained from the exact integration. As far as we are aware, no equation was previously proposed for solid + solid equilibrium lines.

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THE VAPOR PRESSURE OF AMMONIA.¹

Abstract: VAPOR PRESSURE OF AMMONU.

Cited by 28 publications

References 0 publications

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Aqueous alkaline suitable gel system and related mechanism for highly transparent La_0.4Gd_1.6Zr₂O₇ ceramic preparation

Phase equilibria from the exactly integrated Clapeyron equation

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THE VAPOR PRESSURE OF AMMONIA.1

Abstract: VAPOR PRESSURE OF AMMONU.

Cited by 28 publications

References 0 publications

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

A nonlinear regression analysis for estimating low-temperature vapor pressures and enthalpies of vaporization applied to refrigerants

Aqueous alkaline suitable gel system and related mechanism for highly transparent La0.4Gd1.6Zr2O7 ceramic preparation

Phase equilibria from the exactly integrated Clapeyron equation

Contact Info

Product

Resources

About

THE VAPOR PRESSURE OF AMMONIA.¹

Aqueous alkaline suitable gel system and related mechanism for highly transparent La_0.4Gd_1.6Zr₂O₇ ceramic preparation