Improvements for a fully consistent description of the new semi-empirical vapor density model for pure compounds

In chemical engineering, surrogate functions are commonly used in modeling thermodynamic properties of pure compounds because they often more accurate than equations state. 2020, we presented a semi-empirical model describing the vapor density from reduced triple point temperature to about 0.97 with only one temperature-dependent term. However, many cases range up critical is necessary. Therefore, existing was extended by another This allows be described temperature. has additional advantage that it can predict pressure data data. this also for consistency testing. not possible conventionally known models density. The successfully tested using fluoromethane (R41) and difluoromethane (R32) as examples.