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Butanedioic acid, 2,3-dihydroxy- (2R,3R)-, potassium sodium salt, hydrate (1:1:1:4)


Condensed phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
386.13298.15Tatsumi, Matsuo, et al., 1978T = 190 to 308 K.
389.1300.Hicks and Hooley, 1938T = 15 to 340 K.
385.9298.15Wilson, 1938T = 243 to 303 K. Cp(c) = 1.290 + 0.0031t/°C J/g (243 to 303 K), large single cystals. Cp(298.15 K) = 387.8 J/mol*K, Cp = 1.289 + 0.0034t/°C J/g (243 to 303 K), crystalline powder.

Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
212.crystaline, IVcrystaline, IIIDey, Som, et al., 1993 
256.crystaline, IIIcrystaline, IIDey, Som, et al., 1993 
297.crystaline, IIcrystaline, IDey, Som, et al., 1993 

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
42.752328.78crystaline, IIcrystaline, IHicks and Hooley, 1938 

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
130.0328.78crystaline, IIcrystaline, IHicks and Hooley, 1938 

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Tatsumi, Matsuo, et al., 1978
Tatsumi, M.; Matsuo, T.; Suga, H.; Seki, S., Phase transitions of Rochelle salt as studied by high-resolution heat capacity measurements, J. Phys. Chem. Solids, 1978, 39, 427-434. [all data]

Hicks and Hooley, 1938
Hicks, J.F.G., Jr.; Hooley, J.G., The heat capacity of potassium sodium tartrate tetrahydrate from 15 to 340°K, J. Am. Chem. Soc., 1938, 60, 2994-2997. [all data]

Wilson, 1938
Wilson, A.J.C., The heat capacity of Rochelle Salt between -30° and +30°C, Phys. Rev., 1938, 54, 1103-1109. [all data]

Dey, Som, et al., 1993
Dey, P.K.; Som, K.K.; Chowdhury, K.R.; Sarkar, B.K.; Chaudhuri, B.K., Heat capacity anomalies in Rochelle salt (NaKC4H6O6x4H2O) studied with a conduction-type calorimeter, 1993, Phys. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, References