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13
CH1012
NON-IDEAL SOLUTIONS
0              xA           1
T
(ii)  DHsoln  = +ve
0              xA           1
T
(iii) DHsoln  = -ve
bp. curve
Vapour composition curve
 
pA > poAxA,         pB > poBxB
- unfavourable interaction
of the component liquids
pA < poAxA,        pB < poBxB
- favourable interaction of
the component liquids
                        Azeotropic mixture ( bp. const.)
eg. ethanol / H2O 78oC (4% H2O)
eg. HCl / H2O 108oC (80% H2O)