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Дата последнего поиска статьи во внешних источниках: 19 сентября 2015 г.
Аннотация:The temperature and enthalpy of fusion and of the solid-state phase transition in HCOOK were determined by a differential scanning calorimetry (DSC) method. The thermodynamic assessment of the potassium formate–urea–water ternary system and of two binary subsystems was made. The Redlich–Kister model was applied for the description of binary liquids. The Gibbs energy of ternary liquid was assessed by the Muggianu and Bonnier-Toop methods; both methods gave similar results. The thermodynamic properties of potassium formate hydrate were estimated from the liquidus data. The liquidus surface, isothermal and polythermal sections of the phase diagram were calculated. It was shown that the results of calculation correlated with DSC measurements of ternary mixtures.