Liquid-(Solid plus Liquid) Transitions in a Two-Component System of (CH3)CCl3 + CCl4

Yurtseven H., Akayu O.

JOURNAL OF SOLUTION CHEMISTRY, cilt.49, sa.2, ss.195-209, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s10953-020-00951-x
  • Dergi Adı: JOURNAL OF SOLUTION CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.195-209
  • Anahtar Kelimeler: Liquid-(solid plus liquid) transitions, Landau mean field model, (CH3)CCl3 + CCl4, CRYSTALLINE METHYLCHLOROMETHANE COMPOUNDS, CARBON-TETRACHLORIDE, THERMODYNAMIC QUANTITIES, ORIENTATIONAL ORDER, MOLECULAR-STRUCTURE, MELTING CURVES, PHASE, POLYMORPHISM, CCL4, BIREFRINGENCE
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Liquid-(solid + liquid) transitions are studied in (CH3)CCl3 + CCl4 by using the Landau phenomelogical model. The Gibbs energy is expanded in terms of the orientational disorder (OD) parameters for the transitions of the liquid-(rhombohedral + liquid) and liquid-(face-centered cubic + liquid) in a two component system of (CH3)CCl3 + CCl4. From the Gibbs energy, the phase line equations are derived for the transitions studied and they are fitted to the observed T-X phase diagram of (CH3)CCl3 + CCl4 for the concentration (X) CCl4. Temperature and concentration dependences of the OD parameters (psi and eta) and the inverse susceptibility (chi psi-1 and chi eta-1) for the two transitions of interest, are predicted by using the melting curves of (CH3)CCl3 + CCl4 on the basis of the Landau phenomenological model. Our predictions, which can be compared with the experimental data, indicate that the first order transition of the liquid-(solid + liquid), in particular, for (CH3)CCl3 + CCl4 can be described satisfactorily by the Landau mean field model.