Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Citric acid

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Condensed phase thermochemistry data

Go To: Top, References, Notes

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

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Deltafsolid-1543.8 ± 4.6kJ/molCcbWilhoit and Shiao, 1964Reanalyzed by Cox and Pilcher, 1970, Original value = -1544. ± 4.6 kJ/mol; ALS
Quantity Value Units Method Reference Comment
Deltacsolid-1960.6 ± 4.6kJ/molCcbWilhoit and Shiao, 1964Reanalyzed by Cox and Pilcher, 1970, Original value = -1964. ± 4.6 kJ/mol; Corresponding «DELTA»fsolid = -1543.8 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
solid,1 bar252.1J/mol*KN/ADe Kruif, Van Miltenburg, et al., 1982DH

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
226.51300.De Kruif, Van Miltenburg, et al., 1982T = 90 to 330 K.; DH

References

Go To: Top, Condensed phase thermochemistry data, Notes

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

Wilhoit and Shiao, 1964
Wilhoit, R.C.; Shiao, D., Thermochemistry of biologically important compounds. Heats of combustion of solid organic acids., J. Chem. Eng. Data, 1964, 9, 595-599. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

De Kruif, Van Miltenburg, et al., 1982
De Kruif, C.G.; Van Miltenburg, J.C.; Sprenkels, A.J.J.; Stevens, G., Thermodynamic properties of citric acid and the system citric acid-water, Thermochim. Acta, 1982, 58, 341-354. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, References