Xenon melting point

Ripmeester (346) used MAS to study xenon adsorbed on zeolites Na-X and H-mordenite. In the case of faujasite containing excess sorbate, separate lines from liquid, solid, gaseous, and sorbed xenon could be distinguished (see Fig. 67). The presence of a line from adsorbed xenon at 160 K shows that sorbed xenon does not freeze at the bulk xenon melting point. The line from liquid xenon measured at 170 K shifts to high field (Fig. 67b), suggesting that sorbed xenon is more dense than bulk liquid. 

Values extracted and in some cases rounded off from those cited in Rabinovich (ed.), Theimophysical Propeities of Neon, Ai gon, Krypton and Xenon, Standards Press, Moscow, 1976. m = melting point c = critical point. The notation 6.654.-4 signifies 6.654 X 10 . This source contains values for the compressed state up to 1000 bar, etc. This book was published in English translation by Hemisphere, New York 1988 (604 pp.). 

Xenon, 91 boiling point, 307 heat of vaporization, 105 melting point, 307 X-Rays, 248 diffraction patterns, 248... 

Account for the following observations in terms of the type and strength of intermolecular forces, (a) The melting point of solid xenon is —112°C and that of solid argon is — 189°C. 

Thorough studies of solutions of xenon in boron trichloride and boron iribromide were undertaker. A phase study of the melting point of these systems sis a function of composition showed no evidence of compound formation. The Raman spectra of these mixtures are identical to those of pure BX, indicating no noble gas-boron trihalide interactions. 

A deliberate mixture of the three binary xenon fluorides, dissolved in BrFs, was treated with an excess of AsFs. The BrFs and excess AsFs were vacuum distilled in a static vacuum at 0° to leave a mixture of XejFa+lAsFe]-, XeFs+[AsF6]-, and XeF,. The XeF, was recovered by sublimation at 20°, in a dynamic vacuum, to a trap at — 60° and was shown to be pure by its melting point, 117° (Schreiner, el al., give" 117.1°), X-ray powder photograph, and infrared spectrum. 

Thus, the boiling point of xenon is the temperature at which the gas turns into a liquid. The melting point of xenon is the temperature at which liquid xenon turns into a solid. 

Argon has a melting point of — 189.4°G and an atomic radius of 191 pm. Xenon has a melting point of — 111.8°G and an atomic radius of 218 pm. Use this information to predict the melting point and atomic radius of krypton. Explain how you made your predictions. 

The critical temp rat ore of xenon is above the melting point of ice. Consequently in a cool room the gus may lie condensed without artificial cooling, a pressure of 58.2 atmospheres I icing noeesHury. 

Within a periodic group the physical properties vary more predictably, especially if the elements are in the same physical state. For example, the melting points of argon and xenon are 189.2°C and 111.9°C, respectively. We can estimate the melting point of the intermediate element krypton by taking the average of these two values as follows ... 

In any case, the conceptual threshold had been crossed and a family of fluorine-containing xenon compounds is now known. For example, a 1 5 mixture of Xe and F, heated in a nickel vessel, produces XeF (melting point 117°C). XeFg, formed by Xe and F at high temperature and pressure, attacks quartz and reacts violently with water to produce XeOj, itself a high explosive. Obviously, this is not The Friendly World of Chemistry Neighborhood. ... 

Which is more dense, Xe(5) or Xe(/) How do the melting point and boiling point of xenon depend on pressure ... 

Nonbonding atomic solids, such as solid xenon, are held together by relatively weak dispersion forces. Xenon atoms have stable electron configurations and therefore do nof form covalent bonds with each other. Consequently, solid xenon, like other nonbonding atomic solids, has a very low melting point (about —112 °C). 

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