Velocity of Sound in Liquids and Chemical Constitution

摘要

A study of the recently obtained data on the velocity of sound and density in liquids reveals a simple relation between these quantities namely the law,vfrac13;M/rgr; = Rwherevis the velocity of sound in the liquid,Mthe molecular weight, rgr; the density andRa constant independent of temperature. It is shown that the velocity of sound cannot be a proper basis of comparison in any homologous series. The result of plotting the constantRagainst the molecular weight of members of homologous series leads to the equationR= agr;M+ bgr; where agr; is a general constant and bgr; a characteristic constant for any one homologous series. The difference inRfor successive members of homologous series is a constant independent of the series andRis an additive function of the chemical structure. Values ofRfor hydrogen, carbon, oxygen, bromine, and chlorine are tabulated.