Page 29 - Instant notes
P. 29
Non-ideal gases 15
The critical pressure, P c and critical temperature, T c are the pressure and
temperature above which this two phase region no longer exists. The critical temperature
may be calculated from the Van der Waals equation by differentiation, recognizing that at
the critical point on Fig. 2, there is a horizontal point of inflexion in the pressure-volume
curve. This method gives
