Thermodynamic properties of citric acid and the system citric acid-water |
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Authors: | C.G. de Kruif J.C. van Miltenburg A.J.J. Sprenkels G. Stevens W. de Graaf H.G.M. de Wit |
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Affiliation: | Department of General Chemistry, Chemical Thermodynamics Group, State University of Utrecht, De Uithof, 3508 TB Utrecht The Netherlands |
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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. |
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