Measurements of heat capacities at constant volume for aqueous salt solutions (H2O+NaCl, H2O+KCl and H2O+NaOH) near the critical point of pure water

Phase Equilibria in Binary and Ternary Hydrothermal Systems

“…This transition (L-G = >G) takes place again with a drop in heat capacity. 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).…”

Vapor pressures of aqueous KCl and MgCl2 solutions from 273.16 to 643.15K

“…Critical properties of aqueous KCl solutions have been studied by several works [13][14][15][16][17]. Critical pressures (P c ) were obtained at concentrations up to 5 mass%, and critical temperatures (T c ) were reported at concentrations up to 9.45 mass%.…”

“…The accuracies of critical temperatures, critical pressures, and critical compositions were ±1.0 K, ±0.10 MPa, and ±0.001 molal, respectively. Abdulagatov et al [17] claimed that the critical temperature was accurate to 0.01 K without mentioning the uncertainty of the com- Table 3. Table 3. position.…”

Temperatures and Oxygen Isotopic Compositions of Hydrothermal Fluids for the Takatori Tungsten-copper Deposit, Japan

“…This study adopts the tabulated densities of Pitzer et al (1984) and the experimental results of Abdulagatov et al (1998). Those values in Pitzer et al (1984) are at 100º, 120º, 140º, 160º, and 180ºC.…”

“…Concentrations of NaCl are 0.1, 0.25 0.5, 0.75, 1, 2, 3, 4, and 5 molal at each temperature. The results of Abdulagatov et al (1998) at 200º to 340ºC are taken here. NaCl concentrations of those solutions range from 1 to 25 wt%.…”