Vaporisation thermodynamics of caesium iodide and caesium chromate

Add time:08/09/2019    Source:sciencedirect.com

Vaporisation studies over solid and liquid CsI have been carried out by Knudsen effusion (753 – 897 K) transpiration (862 – 1125 K) and boiling temperature (977 – 1430 K) methods. The Knudsen mass loss and transpiration data over CsI(s) are consistent with the presence of monomeric species upto 873 K and the vapour pressure values can be represented by the equation: log10P(kPa) = (7.59 ± 0.12) − 0.00113 T(K) − (10301 ± 95)/T(K) − 21088/T2(K) + 1.13 log10T(K) Transpiration and boiling temperature data were used to calculate partial pressures of monomeric (p1°) and dimeric (p2°) species over CsI(1) and the values obtained can be represented by the following equations: log10P1°(kPa) = (19.67 ± 0.38) − (9628 ± 344)T(K) − 3.65 log10T(K)log10P2°(kPa) = (28.42 ± 0.41) − (9986 ± 415)T(K) − 6.56 log10T(K) Vapour pressure of Cs2CrO4(1) was measured in the temperature range 1225 to 1405 K by transpiration method and vapour pressure calculated assuming monomeric species can be represented by the equation: log10p(kPa) = (8.32 ± 0.26) − (13434 ± 344)T(K)

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