Thermodynamic properties of citric acid and the system citric acid-water
Publication date
1982-11-01
Authors
Kruif, C.G. de
Miltenburg, J.C. van
Sprenkels, A.J.J.
Stevens, G.
Graaf, W. de
Wit, H.G.M. de
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Abstract
The binary system citric acid-water has been investigated with static vapour pressure measurements, adiabatic calorimetry, solution calorimetry, solubility measurements and powder X-ray measurements. The data are correlated by thermodynamics and a large part of the phase diagram is given. Molar heat capacities of citric acid are given from 90 to 330 K and for citric acid monohydrate from 120 to 300 K. The enthalpy of compound formation ΔcomH (298.15 K)=(−11.8±1) kJ mole−1.