%0 Journal Article %1 Abdulagatov1998 %A Abdulagatov, I. M. %A Dvoryanchikov, V. I. %A Mursalov, B. A. %A Kamalov, A. N. %D 1998 %J Fluid Phase Equilibria %K 1998 KCl NaCl aqueous heat-capacity %N 1-2 %P 213 - 239 %R 10.1016/S0378-3812(97)00268-9 %T 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 %U http://dx.doi.org/10.1016/S0378-3812(97)00268-9 %V 143 %X Measurements of isochoric heat capacities CVX for pure water and aqueous salt solutions (H2O+NaCl, H2O+KCl and H2O+NaOH) as a function of temperature along the critical isochores and on the coexistance curves for different concentrations are reported. For binary system H2O+KCl, measurements of CVX along four isochores (333.11, 368.32, 415.97, and 598.09 kg m-3) near the critical point of pure water are reported. Measurements of isochoric heat capacity CV for pure water were also made at critical isochore (rhoc=317.9 kg m-3) and at five near-critical isochores, namely: 309.598, 335.570, 354.480, 370.370, and 373.340 kg m-3, and the coexistence curve. The measurements cover the range in temperature from 371 to 827 K at concentrations from 0 to 0.0932 mole fraction of salt (KCl, NaCl and NaOH). The measurements were made in a high-temperature and high pressure adiabatic nearly constant-volume calorimeter. Uncertainties of the isochoric heat capacity measurements are estimated to be less than ±2%. One- and two-phase heat capacities (CVX', CVX''), temperatures (Ts), and densities (rhos) at saturation were obtained by the method of quasi-static thermograms. The experimental CVX results has been compared with a Pitzer's classical equation of state and with the results of our previous measurements. The relative average deviations for H2O+NaCl, H2O+KCl and H2O+NaOH solutions within about ±2%, except critical region where deviations reached 15-20%.

@article{Abdulagatov1998, abstract = {Measurements of isochoric heat capacities CVX for pure water and aqueous salt solutions (H2O+NaCl, H2O+KCl and H2O+NaOH) as a function of temperature along the critical isochores and on the coexistance curves for different concentrations are reported. For binary system H2O+KCl, measurements of CVX along four isochores (333.11, 368.32, 415.97, and 598.09 kg m-3) near the critical point of pure water are reported. Measurements of isochoric heat capacity CV for pure water were also made at critical isochore ([rho]c=317.9 kg m-3) and at five near-critical isochores, namely: 309.598, 335.570, 354.480, 370.370, and 373.340 kg m-3, and the coexistence curve. The measurements cover the range in temperature from 371 to 827 K at concentrations from 0 to 0.0932 mole fraction of salt (KCl, NaCl and NaOH). The measurements were made in a high-temperature and high pressure adiabatic nearly constant-volume calorimeter. Uncertainties of the isochoric heat capacity measurements are estimated to be less than ±2%. One- and two-phase heat capacities (CVX', CVX''), temperatures (Ts), and densities ([rho]s) at saturation were obtained by the method of quasi-static thermograms. The experimental CVX results has been compared with a Pitzer's classical equation of state and with the results of our previous measurements. The relative average deviations for H2O+NaCl, H2O+KCl and H2O+NaOH solutions within about ±2%, except critical region where deviations reached 15-20%.}, added-at = {2011-01-19T18:05:16.000+0100}, author = {Abdulagatov, I. M. and Dvoryanchikov, V. I. and Mursalov, B. A. and Kamalov, A. N.}, biburl = {https://www.bibsonomy.org/bibtex/2b73f3ea6fd8eae6a394c539064ca93a4/thorade}, description = {ScienceDirect - Fluid Phase Equilibria : 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}, doi = {10.1016/S0378-3812(97)00268-9}, interhash = {c883b3dc137d59a997543a092f8dc805}, intrahash = {b73f3ea6fd8eae6a394c539064ca93a4}, issn = {0378-3812}, journal = {Fluid Phase Equilibria}, keywords = {1998 KCl NaCl aqueous heat-capacity}, number = {1-2}, pages = {213 - 239}, timestamp = {2012-11-02T19:11:37.000+0100}, title = {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}, url = {http://dx.doi.org/10.1016/S0378-3812(97)00268-9}, volume = 143, year = 1998 }