Generalized coordinates, equilibrium phase diagrams

Since in all the above-mentioned systems the phase transition occurs with the presence of the vapor phase, the problem of finding the melting/freezing point reduces to the determination of the triple point for each of the cases considered. The general approach to treating this problem is based on the Clausius-Clapeyron relations, describing the solid-vapor and liquid-vapor lines of equilibrium on the phase diagrams in the pressure versus temperature coordinates ... 

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