PHYSICAL CHEMISTRY IN BRIEF

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 220

c

T T

Tf2 Tf2

Tf1

Tf1

(l)

(l)

(s) (s)

>

(s)+(l) (^9) z
(s)+(l)
0 x 1 1 0 x 1 1
a) b)
Obr.7.12: Two cases of the dependence of the freezing temperature (the upper curves) and the
melting temperature (the lower curves) on composition in a two-component system with components
completely miscible in both the liquid and solid phases. Case b) is an analogy to the azeotropic
behaviour.
0 x^11

E

(s 2 )+(s 1 )

(s 2 )+(l)

(l)

C

D

) (l)+(s^1 )

Tf2

T

Tf1

q /

(l 1 )+(l 2 )

(s 2 )+(l)

Obr.7.13:Dependence of the freezing temperature on composition for a two-component system; the
liquid phases are partially miscible, the solid phases are immiscible.