Prediction of the speed of sound in ionic liquids as a function of pressure

Abstract

In this work, we demonstrate the possibility of calculating the speed of sound of Ionic Liquids as a function of temperature and pressure using the fluctuation-based approach. The density, speed of sound, and heat capacity at atmospheric pressure are used for the calculations. The collected experimental data from the ILThermo database were used as input. The high-pressure speed of sound for nine ionic liquids was used to compare and analyze. Using the proposed method, the relative average absolute deviation is close to 0.85%.