Volumes and heat capacities of aqueous solutions of ammonium chloride from the temperatures 298.15 K to 623 K and pressures to 28 MPa

Volumes and heat capacities of aqueous solutions of hydrochloric acid at temperatures from 298.15 K to 623 K and pressures to 28 MPa

“…The temperature rise and calibration factors are given elsewhere. (7) b Difference between measured Cp,f values and those fitted using equation (12). pairing in the model because the qualitative trends at T q 573 K clearly indicate extensive association (see discussion below).…”

“…The correction factors were determined by calibration at each temperature using pure water at different flow rates and have been presented elsewhere. (7) The reported temperature for calorimetric measurements represents the average value of the temperature before and after the cell heater:…”

“…The values of the calibration constants were reported earlier by Sharygin and Wood. (7) At each experimental temperature and pressure, the densimeter was tested by measuring the density for NaCl(aq) with m = 3.0011 mol·kg − 1 . The experimental results obtained for this solution were in good agreement with the literature values for NaCl(aq).…”

“…Our experimental values were in satisfactory agreement with other literature results. (7) Stock solutions of HCl(aq) were prepared from A.C.S. reagent (Aldrich Chemical Co; mass fraction 0.37 of HCl; largest impurity was mass fraction 5·10 − 5 of Br − ), and diluted with distilled and deionized water to the desired solution molalities.…”

“…The experimental results obtained for this solution were in good agreement with the literature values for NaCl(aq). (7) The flow Picker-type calorimeter was used for heat capacity measurements. The design of the instrument, as well as experimental and calibration techniques, were previously described in detail by Carter and Wood.…”