Thermodynamic Properties of Liquids from Speed of Sound Measurements

Authors : Muhamed BİJEDİC

Pages : 61-68

View : 13 | Download : 11

Publication Date : 2012-05-17

Article Type : Research Paper

Abstract :A strategy for deriving thermodynamic properties of liquids insert ignore into journalissuearticles values( r , c p , c v ); from speed of sound is presented. It is based on numerical integration of differential equations connecting speed of sound with other thermodynamic properties. Two different procedures are recommended: One for liquids with lower and moderate critical pressures insert ignore into journalissuearticles values(LMCP);, and another for liquids with higher critical pressures insert ignore into journalissuearticles values(HCP);. The set of differential equations is solved as the initial value problem in both cases. However, for LMCP liquids initial conditions insert ignore into journalissuearticles values(several accurate values of r and c p ); are specified along isobar near the critical pressure, and for HCP liquids along the liquid-vapor saturation curve. The procedures are tested on ethane, carbon dioxide, and water.
Keywords : Density, Heat capacity, Liquids, Speed of sound