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1
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2
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0
0
0
0
;
SdTT
CS
dTT
CSSS
CdT
dq
T
dTC
T
dqdS
Tp
T
Tp
T
pp
prev
3
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TvsdT
dG
TvsS
SdT
dG
TSHG
;
4
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T
5
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6
)(;* Tepp (l) (g)
(s) (g)
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7
*
11
;*
TTR
H
epp
vap
*
11
TTR
Hsub
VT
H
dT
dp
fus
fus
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8
Eða:
*
11;*
TTR
Hepp vap
*ln*
1ln p
RT
H
TR
Hp vapvap
Sbr.
lnP
1/T
Hallatala =-vapH/(zR)-vapH/R
![Page 9: 1. 2 3 4 T 5 6 (l)(g) (s)(g) 7 8 Eða: Sbr. lnP 1/T Hallatala = - vap H/(zR) - vap H/R](https://reader034.vdocuments.mx/reader034/viewer/2022042615/56649d635503460f94a465a4/html5/thumbnails/9.jpg)
9
Almennt
Vatn / H2O
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10
(s) (g)
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11
Fasareglan:
F=C-P+2
F = Frelsisgráður / fjöldi breytistærða
C = “Components”/fjöldi efna(1)P = “Phases”/ fjöldi fasa
Sbr.:
F=1-2+2=1 (t.d. T p ákvarðanlegt)
F=1-1+2=2 (p og T)
.
F=1-3+2=0 (p og T ákvarðað)
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Ath: C1; 1) C = 2: Blöndur tveggja efna: 1. Varmafræði:
Óreiðubreyting blöndunar:)lnln( BBAAmix xxxxnRS
Frjálsorkubreyting blöndunar:
STG mixmix
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13
Frjáls orka G vs T
*)()( gAgA
*)()( sAsA
AlAlA xRT ln*)()(
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Gufuþrýstingur kjörlausna(p) vs samsetning (xA) / p vs xA :
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Lausnir af líkum sameindumkjörlausnir
15
P vs xA
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Lausnir af ólíkum sameindumraunlausnir
Fráhrindi-krafturCS2 aceton
Gufuþrýstingur meiri en hjákjörlausnum
16
P vs xA
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17
Henry´s lögmál vs Raoults lögm.
Raunlausn:P vs xA
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Gufuþrýstingur vs samsetning vökva (kjörlausn):
Gufuþrýstingur vs samsetning vökva (xA) og gufu (yA)(kjörl.):
18
P vs xA
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19
P vs T:
Tb
P=1atm
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Tb vs xA:20
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Tb vs xA:21
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Tb vs xA: Raunlausnir:22
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23
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Raunlausnir / lausnir torleystra vökva
Hexan og nitrobensen
24
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Fasalínurit torleystra vökvablandna: