From the computed thermal expansion coefficient from density variation with temperature, on N-(p-n-ethyloxybenzylidene)-p-n-alkoxy anilines, 2O.Om liquid crystalline (LC) compounds with m = 3-4 and 610, different thermodynamic parameters such as Sharma parameter (S-o), Huggins parameter (F), reduced volume (similar to V), reduced compressibility (similar to V-C1), etc., are studied using the volume expansion coefficient (alpha), which is estimated from density in isotropic and liquid crystalline phases. The parameters like intermolecular free length (Lf), molecular radius (M-r), and Beyer's nonlinearity parameter (B/A) are also computed from density data for the above compounds. Except with m = 10, the rest of the compounds exhibit nematic phase where as with m = 10, the LC material shows smectic-C in addition to the nematic phase. The results are discussed in the light of these parameters variation with temperature in a particular phase in a LC molecule and with the chain length, m. The thermodynamic parameter S-o exhibits a constant characteristic value in all the compounds like other reported liquid crystalline compounds, liquids, and polymers. Further, the molecular radius, M-r, and molecular free length, L-f, are estimated and the results are compared with the literature data available.