Title: THERMODYNAMIC PROPERTIES OF LIQUID ALKALI METALS
Author(s): P.B.Thakor, P.N.Gajjar, A.R.Jani (Department of Physics, Sardar Patel University, Vallabh Vidyanagar-388120, Gujarat, India)

The internal energy, entropy and Helmholtz free energy of liquid alkali metals, viz. Na, K, Rb and Cs are investigated using pseudopotential perturbation scheme based on Gibbs-Bogoliubov variational technique. A local pseudopotential is applied to describe the electron-ion interaction in the liquid alkali metals. To introduce the exchange and correlation effects, the local field correction function proposed by Taylor is employed. The computed values for internal energy, entropy and Helmholtz free energy for the liquid alkali metals are in excellent agreement with the experimental data.

Key words: internal energy, entropy, Helmholtz free energy, pseudopotential
PACS: 65.50, 71.15.H