P(T, v) surface for a van-der-Waals substance
Channel: CNThermSci channel
Date: 28/03/2020

P(T, v) surface for a van-der-Waals substance in reduced coordinates.

The reduced (dimensionless) van-der-Waals equation isotherms are shown as white lines, saturated liquid and vapor states are drawn in yellow, two-phase equilibrium states – dome isotherms – are shown in cyan, the critical state is indicated by a white circle marker.

Saturated liquid and vapor states were determined by Maxwell's equal-area construction rule, or simply Maxwell's construction.

Equations (van-der-Waals and Gibb's solution to Maxwell's construction) coded in Python3, frame by frame plots done in MatPlotLib by Prof. C. Naaktgeboren.

Intro and Outro musical excerpts from copyright-free "Smile" by Sappheiros: https://www.youtube.com/watch?v=pBjtSJhb5zM.