Thermodynamical properties of RbCs liquid binary alloys

Abstract

Our well established model potential is applied to compute the thermodynamical properties like internal energy (E), entropy (S _hs), Helmholtz free energy (F ), heat of mixing (ΔE) and entropy of mixing(ΔS) of Rb_c1Cs_c2 liquid binary alloys as a function of concentration at constant temperature and pressure. To introduce exchange and correlation effects, the local field correction functions due to Hartree, Taylor and Sarkar et al. are used. It is found that thermodynamical properties of Rb_c1Cs_c2 liquid binary alloys are sensitive to the form of the model potential used, structural part of the energy, form of the local field correction function and volume of the mixing. The theory explains the symmetry of heat of mixing and entropy of mixing. Thus, the proper choice of the model potential along with the local field correction function plays an important role in the study of the thermodynamical properties of Rb_c1Cs_c2 liquid binary alloys. This confirms the applicability of our model potential in explaining the thermodynamics of liquid Rb_c1Cs_c2 liquid binary alloys.

Keywords:

• pseudopotential
• thermodynamical properties
• internal energy
• entropy
• Helmholtz free energy
• heat of mixing
• entropy of mixing

Acknowledgements

P.B. Thakor acknowledges the financial support from the University Grants Commission, New Delhi under a Major Research Project F. No. 33-26/2007 (SR).