“…Such phenomena were observed in aqueous solutions of KNO 3 , CH 4 O, KCl, NaCl, NaOH (Abdulagatov et al, 1997(Abdulagatov et al, , 1998. A method of T-Cv curve was also used to determine the parameters of phase transformations in fl uid systems complicated with immiscibility phenomena (aqueous n-heptane, n-hexane, n-hexane+1-propanol mixtures) (Mirskaya, 1998;Stepanov et al, 1999;Kamilov et al, 2001). For binary systems where a solubility of solid in liquid phase decreases with temperature, heating of the liquid solution in the equilibrium with vapor can lead to other phase transitions besides those mentioned above.…”