A simple correlation for prediction of heat capacities of ionic liquids

Ionic liquids, owing to their unique characteristics grasp many researchers’ attention in both academia and industrial fields. In this communication, the attention is focused on the heat capacity of ionic liquids, as one of the most basic and important thermophysical properties. The simple 5-term temperature dependent correlation based on basic molecular parameters is presented to predict heat capacities of ILs. A total data set of 2940 experimental data belonging to 56 ionic liquids was used to develop a general correlation. The global absolute average deviation of the model results from experimental values is 2.5%. The proposed model could be safely applied for thermodynamic and industrial applications.

► A very simple model for estimation of heat capacity of ionic liquids is introduced.
► The capability of the model was assessed using experimental data for 56 ionic liquids.
► Statistical parameters demonstrate that the model is in good agreement with experimental data.