Isobaric specific heat capacity of {xH2O+(1−x)NH3} with x=(0.0000, 0.1566, 0.1597, 0.3030, 0.3048, 0.4956, 0.7061, and 0.8489) at T=(280, 300, 320, and 360)K over the pressure range from (0.1 to 15)MPa

Fujita, Itaru; Suzuki, T.; Uematsu, M.

doi:10.1016/j.jct.2007.06.013

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…Data at higher pressure available in Fujita 112 and Hnedkovsky. 150 The fit covers the entire range 0 e w NH3 e 1.…”

Section: T H I S C O N T E N T Imentioning

confidence: 99%

A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data

Laliberté

2009

J. Chem. Eng. Data

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A model for calculating the heat capacity of complex aqueous solutions with an arbitrary number of solutes and at an arbitrary temperature was developed. Parameters for 79 solutes were established based on a critical review of the literature for solutions of one solute in water, with about 6600 points included. The average difference between the calculated and experimental heat capacity is −0.0003 kJ·kg−1·K−1 with a standard deviation of 0.010 kJ·kg−1·K−1. The model was validated by comparing published and calculated heat capacities for 13 systems of more than one solute in water, with a total of 485 data points. The average difference between experimental and calculated values is −0.003 kJ·kg−1·K−1 with a standard deviation of 0.029 kJ·kg−1·K−1. Data are presented on the following 109 solutes, including data on density (16 300 points) and viscosity (10 700 points): (NH4)2SO4, Al2(SO4)3, AlCl3, Ba(NO3)2, BaCl2, Ca(CH3CO2)2, Ca(NO3)2, CaCl2, CaSO4, Cd(NO3)2, CdCl2, CdSO4, CH3CH2OH, CO2, CoCl2, CoSO4, Cr2(SO4)3, CrCl3, Cu(NO3)2, CuCl2, CuSO4, Fe2(SO4)3, FeCl2, FeCl3, FeSO4, H2O2, H2SO4, H3AsO3, H3AsO4, H3PO4, HBr, HCH3CO2, HCHO2, HCl, HCN, HNO3, K2CO3, K2Cr2O7, K2HPO4, K2SO4, K3PO4, KBr, KCH3CO2, KCHO2, KCl, KF, KH2PO4, KHCO3, KHSO3, KI, KNO2, KNO3, KOH, Li2SO4, LiCH3CO2, LiCl, LiNO3, LiOH, Mg(CH3CO2)2, Mg(NO3)2, MgCl2, MgSO4, Mn(NO3)2, MnCl2, MnSO4, Na2C2O4, Na2CO3, Na2CrO4, Na2HPO4, Na2MoO4, Na2S, Na2S2O3, Na2SO3, Na2SO4, Na2WO4, Na3PO4, NaAl(OH)4, NaBr, NaCH3CO2, NaCHO2, NaCl, NaClO3, NaF, NaH2PO4, NaHCO3, NaHS, NaHSO3, NaHSO4, NaI, NaMnO4, NaNO2, NaNO3, NaOH, NH3, NH4Cl, NH4HCO3, NH4NO3, Ni(NO3)2, NiCl2, NiSO4, Pb(NO3)2, SO2, Sr(NO3)2, SrCl2, Sucrose, TiOSO4, Zn(NO3)2, ZnCl2, ZnSO4.

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“…Data at higher pressure available in Fujita 112 and Hnedkovsky. 150 The fit covers the entire range 0 e w NH3 e 1.…”

Section: T H I S C O N T E N T Imentioning

confidence: 99%

A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data

Laliberté

2009

J. Chem. Eng. Data

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“…In previous publications [1][2][3][4][5], we reported measurements of (p, q, T, x), bubble point pressure, saturated liquid density, isobaric specific heat capacity, and the critical parameter for {xNH 3 + (1 À x)H 2 O} with x = (0.1016 to 1.0000) by a metal-bellows variable volumometer in the compressed liquid phase at T = (280 to 405) K at pressures up to p = 17 MPa. In continuation of our work, the results of the (p, q, T, x) property measurements for {xNH 3 + (1 À x)H 2 O} with x = (0.1048 to 1.0000) in the higher temperature and pressure regions at T = (450, 500) K, and at p = (10 to 200) MPa are presented in this paper.…”

Section: Introductionmentioning

confidence: 98%

The (p,ρ,T,x) properties for {xNH3+(1−x)H2O} at T=(450 and 500)K over the pressure range from (10 to 200)MPa

Muromachi¹,

Miyamoto²,

Uematsu³

2008

The Journal of Chemical Thermodynamics

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“…Results from Chan and Giauque, Hildenbrand and Giauque, and Wrewsky and Kaigorodoff were the only caloric data sets considered. Other calorimetric studies were either conducted at room temperature, with very dilute mixtures, or with sparse results. , To date, there are no extensive studies of isobaric heat capacity in the binary water–ammonia system at low temperatures and mass fraction conditions relevant to outer solar system planetary studies (0–5 GPa, 100–300 K, 0–15 wt %) . The poor coverage of data at this space is primarily due to difficulty in measuring low ammonia mass fraction samples due to its high volatilization capacity at surface Earth conditions and a heavier focus on higher mass fraction solution properties for absorption refrigeration applications .…”

Section: Introductionmentioning

confidence: 99%

“…This work improves upon the current data set and also introduces novel data in the parameter space most relevant for outer solar system planetary bodies, shown as the shaded region and the shaded line along the melting curve. CG64—Chan and Giauque; 19 HG53—Hildenbrand and Giauque; 20 WK24—Wrewsky and Kaigorodoff; 22 C71—Chernen’kaya; 23 AW81—Allred and Woolley; 24 F08—Fujita et al; 25 and P22—Prieto-Ballesteros et al 26 …”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Specific Heat Capacity of Water–Ammonia Mixtures Down to the Eutectic

Chua,

Gloesener,

Choukroun

et al. 2023

ACS Earth Space Chem.

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Robust thermodynamic data are essential for the development of geodynamic and geochemical models of ocean worlds. The water–ammonia system is of interest in the study of ocean worlds due to its purported abundance in the outer solar system, geological implications, and potential importance for origins of life. In support of developing new equations of state, we conducted 1 bar specific heat capacity measurements (C p) using a differential scanning calorimeter (DSC) at low temperatures (184–314 K) and low mass fractions of ammonia (5.2–26.9 wt %) to provide novel data in the parameter space most relevant for planetary studies. This is the first known set of data with sufficient fidelity to investigate the trend of specific heat capacity with respect to temperature. The obtained C p in the liquid phase domain above the liquidus generally increases with temperature. Deviations of our data from the currently adopted equation of state by Tillner-Roth and Friend[Tillner-RothR.FriendD. G. Tillner-Roth, R. Friend, D. G. J. Phys. Chem. Ref. Data1998276396 are generally negative (ranging from +1 to −10%) and larger at lower temperatures. This result suggests that suppression of the critical behavior of supercooled water (rapid increase in specific heat with decreasing temperature) by ammonia starts at a smaller concentration than that set by Tillner-Roth and Friend.[Tillner-RothR.FriendD. G. Tillner-Roth, R. Friend, D. G. J. Phys. Chem. Ref. Data1998276396]. C p measurements of the liquid were also obtained in the partial melting domain between the eutectic and liquidus. This novel data set will be useful in future investigations of conditions where such partial melt may exist, such as the ice shell–ocean boundary or the interiors of ocean worlds that may contain relatively large proportions of dissolved ammonia.

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Isobaric specific heat capacity of {xH2O+(1−x)NH3} with x=(0.0000, 0.1566, 0.1597, 0.3030, 0.3048, 0.4956, 0.7061, and 0.8489) at T=(280, 300, 320, and 360)K over the pressure range from (0.1 to 15)MPa

Cited by 7 publications

References 11 publications

A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data

A Model for Calculating the Heat Capacity of Aqueous Solutions, with Updated Density and Viscosity Data

The (p,ρ,T,x) properties for {xNH3+(1−x)H2O} at T=(450 and 500)K over the pressure range from (10 to 200)MPa

Low-Temperature Specific Heat Capacity of Water–Ammonia Mixtures Down to the Eutectic

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