( 35 ) 
| infinity, as was formerly sometimes supposed, but it will indicate a 
very decided (positive or negative) value of the pressure for T=z 0. 
Hence with high pressure we must always reach the liquid state 
through the solid state, when A b is negative, however low the tem¬ 
perature may be. And in the same way the solid state through the 
liquid state, when for Lb positive {SM then runs to the right) the 
temperature gets above the triple-point temperature. 
But we shall soon discuss this more fully. We may now only 
add the following remarks to what precedes. 
AS P = ^Lb ~ ^ everywhere between E and D for T= 0(see 
above), we find the pressure of coexistence solid-liquid p 0 evidently 
yielding: 
In this i\ is the volume of the solid phase (= b ,) and v, that of 
the liquid phase (=2 b,), while Vl ~v,= ~Ab. With our values 
this becomes therefore p, = 6400 — 5400 = 1000, so a positive 
pressure. 
_ The course of 0 along the curve DE may be found from: 
V = b = b, 
from which: 
(T = 0) p. 
~ —Lb' 
running from 1 at v = 26 2 to 0 at v = o 
I The value of v ° on the id eal isotherm ED, corresponding with 
the pressure of coexistence p 0 , is found from p = — 1 , yielding : 
hence 
q ' a __ 
—Lb v x v 2 —Lb v* ’ 
V 0 = \/v x v % . 
As to the direction of the p,T -\ine SM for T-- 
determined from the well known equation: 
dp _ L E 
dT^~TLV' 
3 * 
