Speed Of Sound Of Oxygen In Supercritical States Up To 500 K And 100 Mpa

Oxygen is the second-most abundant element in the earth's atmosphere and plays an important role in various engineering applications. The precise knowledge of its thermophysical properties is thus important. As a fully fledged thermodynamic property, the speed of sound substantially contributes to the development and parametrization of equations of state. This work presents experimental speed of sound data for oxygen measured with an apparatus that is based on the pulse-echo technique with a double path-length. When working with pure oxygen at high temperatures and pressures, tight safety requirements have to be met, limiting the present measurements to 500 K and 100 MPa.