The study of stereoisomerism influence on speed of sound, isentropic compressibility and heat capacity

Y. Miyake (1, 2) , David Bessieres (1) , Frédéric Plantier (1) , Hideharu Ushiki (2) , Christian Boned (1)

1 TEFC - Thermodynamique et Energétique des fluides complexes
2 Laboraty of molecular dynamics and complex chemical physics

In order to study the influence of stereoisomerism on thermodynamic derived properties, an extensive experimental study has been carried out for the two stereoisomers of decahydronaphthalene known as cis-and trans-decalin. For both compounds, speed of sound data are reported up to 150 MPa in the temperature range 303.15 to 373.15 K. Heat capacity measurements are presented up to 60 MPa for temperature ranging from 313.15 to 383.15 K. The experimental speed of sound together with the heat capacity data were used to estimate densities and compressibilities of the fluids up to 150 MPa. The thermodynamic consistency between volumetric, acoustical and calorimetric properties is then checked. The effect of stereoisomerism on speed of sound, isentropic compressibility and heat capacity behaviours is analyzed. It is concluded that the influence observed on these thermodynamic properties mainly results from volumetric effects.

Mots clés: decalin; heat capacity; isentropic compressibility; speed of sound; stereoisomerism

Domaines: Chimie-Physique [physics.chem-ph]

Y. Miyake, David Bessieres, Frédéric Plantier, Hideharu Ushiki, Christian Boned. The study of stereoisomerism influence on speed of sound, isentropic compressibility and heat capacity. Journal of Thermal Analysis and Calorimetry, 2007, 91 (2), pp.347-354. ⟨10.1007/s10973-007-8459-z⟩. ⟨hal-00339105⟩