کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216882 | 1426306 | 2008 | 6 صفحه PDF | دانلود رایگان |
In this paper, the sublimation pressure of Ar, Kr, and Xe are obtained as functions of temperature from an exactly integrated form of the Clapeyron equation. No fitting to experimental data of the equilibrium pressure has been necessary. The deviation plots of the sublimation pressure show that the results are satisfactory. The derived enthalpy of sublimation of the three rare gases from T = 0 K up to their respective triple point temperatures are asymmetric, distorted parabolas showing maxima for Cp,mg=Cp,ms. The ΔsgHm(T=0K), which is a measure of the cohesion energy of the solid crystals, is easily calculated. A general equation has been obtained for ΔsgHm as a function of temperature which also gives the enthalpies of sublimation of neon and radon. The (s + ℓ + g) triple point coordinates of Rn are reassessed.
Journal: The Journal of Chemical Thermodynamics - Volume 40, Issue 12, December 2008, Pages 1621–1626