F G :
dF = - PdV SdT + Σμidni (7.22)
dG = VdP SdT + Σμidni, (7.23)
Σμidni , F G
;
μi i .
V = Const T = Const, (7.22) :
(7.24)
P = Const T = Const, (7.23) :
(7.25)
, (7.24) (7.25) :
= μi (7.26)
, . (7.25) , .
μi = (7.27)
, , , .
. , 1 2. , i. , :
μ = μ (7.28)
: , .
, .
, . :
d = VdPi - Td (7.29)
= Const (7.29) :
d = VdPi (7.30)
, , :
V = (7.31)
(7.30) :
d = (7.32)
(7.32) , , , :
= (7.33)
, (7.34)
P - i .
. (7.34) :
(7.35)
, μi = . :
|
|
μi = μ + RTlnPi, (7.36)
μ - i
, .
, , :
μi = μ + RTlni (7.37)
μi = μ + RTlni, (7.38)
i i ;
i - i ,
.
, , n1 1 n2 2, :
n1d + n2d = 0 (7.39)
= onst :
dμi = RTlnPi (7.40)
(7.40) (7.39) :
n1dlnP1 + n2dlnP2 = 0 (7.41)
1dlnP1 + 2dlnP2 = 0 (7.42)
(7.41) (7.42) .