“The Generalized Van-der-Waals-Bertlo Equation” (Part I): Description of the Gas Evaporation Line

In the present paper, only the Van-der-Waals and the Berthelot equations and their generalizations are considered. The evaporation curve is calculated for the Van-der-Waals and Berthelot gases. It was shown that the evaporation curve of real gases resides between those of Van-der-Waals and Berthelot gases. The generalized Van-der-Waals-Berthelot equation is proposed, which characterises evaporation curves of actual gases qualitatively and quantitatively. It was further demonstrated that the generalized Van-der-Waals and Berthelot equation accurately describes other real-world properties.