Torsion vapor pressures and sublimation entalpies of arsenic triselenide and tritelluride (Articolo in rivista)

Type
Label
  • Torsion vapor pressures and sublimation entalpies of arsenic triselenide and tritelluride (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/je060083k (literal)
Alternative label
  • B. Brunetti, V. Piacente, P. Scardala (2007)
    Torsion vapor pressures and sublimation entalpies of arsenic triselenide and tritelluride
    in Journal of chemical and engineering data
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • B. Brunetti, V. Piacente, P. Scardala (literal)
Pagina inizio
  • 24 (literal)
Pagina fine
  • 29 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 52 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • P. Scardala: Universit√† La Sapienza V. Piacente: Universit√† La Sapienza (literal)
Titolo
  • Torsion vapor pressures and sublimation entalpies of arsenic triselenide and tritelluride (literal)
Abstract
  • Total vapor pressures of As2Se3 and As2Te3 were measured by the torsion-effusion method, and their temperature dependences were found to fit the following equations: As2Se3(s), log(p/kPa) = (12.20 +/- 0.20) to (9170 +/- 130)/(T/K) and As2Te3(s), log(p/kPa) = (10.45 +/- 0.20) to (8185 +/- 150)/(T/K). Considering the complex mode of vaporizing of As2Se3, the mean second-law enthalpy and entropy values associated to the sublimation of 1 mol of the vapor mixture at the mid-point temperature, Delta H degrees(587 K) = (175 +/- 3) kJ center dot mol(-1) and Delta S degrees(587 K) = (233 +/- 4) J center dot K-1 center dot mol(-1), were calculated from the temperature dependence of its vapor pressure. As2Te3 dissociates upon sublimation yielding As-4(g) and Te(s). Both As-4(g) and Te-2(g) are present in the vapor over Te-saturated As2Te3, where the Te-2(g) partial pressures are considered equal to the vapor pressure of the pure element. On this basis, treating the pressure data by second- and third-law methods, the standard sublimation enthalpy associated to the sublimation reaction, As2Te3(s) = 0.5 As-4(g) + 3 Te(s), Delta H degrees(298 K) = 81 +/- 2 kJ center dot mol(-1), was determined. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it