isentropic

Isentropic curves, which lie on the right and on the left of this group, will show a point of condensation at a lower pressure.

In the same way the critical point of the isentropic curves comes nearer to that of the isothermals.

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.