Chemistry I Notes

MM II SS
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CE

Rft RR


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, 59 :b



Chapter 15 EQUILIBRIUM
video

:



Afg) → Bfg) ,
ideal gas i
Xp Xp ,
→
more fractions of A →
B


A and B have different Gibb's energies GAO and GBO .




6 GO
When reacting some A -013 the overall
changes by XB Dr
So : -




a-
-




z
- - -

-
- -
- -




Dr GO /

µ¥§
-
- -
- - -




G =


GAO x x
,
Gao
/
for spontaneous reaction ( Br 6%0 ) : 460
BG


/
a




¥
& When reacting
,
some A and B ,
Bmixes into A ( they I
- -
- - - -




combine) and this increases
.
the entropy and creases
#
o
O . Z Ory of 0.8 1.0


Bmi [( e xpsllnfl-xp.lt/plnxps)
G RT
Mole fraction B ( XB)
=
-



,




G =

Gn? +
XB Dr G +
Dm 6


All though this reaction is spontaneous ,
not all of A is mixed into B .
Thus the minimum of G at 0.8 is
called the EQUILIBRIUM
t f




↳
XB is the equilibrium concentration where G has a minimum




The position of the equilibrium is only defined by DRG

Nz04cg) -02 Nozfg)
won
for
×
On
'
Fr se




composition of equilibrium equilibrium composition of equilibrium
composition of


mixture is more towards mixture is towards
mixture is almost right more



the reactants .
inbetween products and the products .




reactants