The vapour pressures of saturated aqueous solutions of magnesium,calcium, nickel and zinc acetates and molar enthalpies of solution of magnesium,calcium, zinc and lead acetates |
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| Institution: | 1. DSM Applied Science Center, P.O.Box 1066, Geleen 6160 BB, the Netherlands;2. Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600 MB, the Netherlands |
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| Abstract: | Vapour pressures of water over saturated solutions of magnesium, calcium, nickel and zinc acetates were determined as a function of temperature. The vapour pressures served to evaluate the water activities, osmotic coefficients and molar enthalpies of vaporization. Molar enthalpies of solution of magnesium acetate tetrahydrate,ΔsolHm (T = 294.71K ;m = 0.01 mol · kg − 1) = − (15.65 ± 0.97)kJ · mol − 1; calcium acetate,ΔsolHm (T = 297.18K ;m = 0.01 mol · kg − 1) = − (28.15 ± 0.28)kJ · mol − 1; zinc acetate dihydrate,ΔsolHm (T = 297.36K ;m = 0.01 mol · kg − 1) = − (22.49 ± 0.90)kJ · mol − 1and lead acetate trihydrate,ΔsolHm (T = 297.36K ;m = 0.0086 mol · kg − 1) = (22.46 ± 0.94)kJ · mol − 1, were determined calorimetrically. |
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