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Speed of Sound as a Thermodynamic Property of Fluids



Daniel G. Friend


In this chapter, we review the principles of sound propagation in fluid systems. From a study of the hydrodynamic equations, sound propagation is shown to be a wave phenomenon. The speed of sound then can be derieved at any state point from a knowledge of the thermodynamic surface of the fluid of interest. Several model equations of state are reviewed, and it is shown how the speed of sound can be obtained for a variety of systems. We then focus on several fluids of particular interest, and show the behavior of the sound speed over a wide range of the temperature and pressure variables. Tabulated values of the speed of sound are given for argon, nitrogen, water, and air based on the current standard reference thermodynamic surfaces.
Experimental Methods in the Physical Sciences
Publisher Info
Academic Press, San Diego, CA


equations of state, sound speed, thermodynamics, wave equation


Friend, D. (2001), Speed of Sound as a Thermodynamic Property of Fluids, Academic Press, San Diego, CA (Accessed April 16, 2024)
Created September 15, 2001, Updated June 2, 2021