The free energy of formation of the compound CaCsCl/sub 3/ from CaCl/sub 2/ and CsCl has been determined by measuring the sublimation pressure of CsCl(g) over CaCsCl/sub 3/(s) and over CsCl(s) using Knudsen effusion mass spectrometry. The free energy change for the reaction CaCl/sub 2/(s) + CsCl(s) = CaCsCl/sub 3/(s) at 298 K is /minus/40.7 +/- 6.4 kJ mol/sup /minus/1/. The enthalpy change is /minus/33.5 +//minus/ 5.2 kJ mol /sup /minus/1/ and the entropy change is 23.4 +//minus/ 3.7 J K/sup /minus/1/ mol/sup /minus/1/. Comparisons are made with determinations of these quantities by other investigators. 15 refs., 2 figs., 6 …
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The free energy of formation of the compound CaCsCl/sub 3/ from CaCl/sub 2/ and CsCl has been determined by measuring the sublimation pressure of CsCl(g) over CaCsCl/sub 3/(s) and over CsCl(s) using Knudsen effusion mass spectrometry. The free energy change for the reaction CaCl/sub 2/(s) + CsCl(s) = CaCsCl/sub 3/(s) at 298 K is /minus/40.7 +/- 6.4 kJ mol/sup /minus/1/. The enthalpy change is /minus/33.5 +//minus/ 5.2 kJ mol /sup /minus/1/ and the entropy change is 23.4 +//minus/ 3.7 J K/sup /minus/1/ mol/sup /minus/1/. Comparisons are made with determinations of these quantities by other investigators. 15 refs., 2 figs., 6 tabs.
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