In the same way the critical point of the isentropic curves comes nearer to that of the isothermals.
isentropic curves, which lie on the right and on the left of this group, will show a point of condensation at a lower pressure.
If k/(k - 1) < ∫′ (Tc/T), the isentropic curve rises more steeply than the border-curve.
But in this case all isentropic curves, if sufficiently prolonged, will enter the heterogeneous region.
Following the isentropic curve the value of T/pdp/dT is equal to k/(k - 1).