Table 2. FREZCHEM2 model output for freezing seawater at 45C and
at 55C.
Seawater freezing
temperature 45.00C (228.15 K)
SOLID PHASES
N
Phase
Moles
G/RT
1
H2O(cr,I)
53.52785
0.4278
NaCl*2H2O(cr)
0.42624
1.0995
2
3
KCl(cr)
0.00948
0.8002
4
MgCl2*12H2O(cr)
0.05052
1.2364
Na2SO4*10H2O(cr)
0.02925
12.2171
5
AQUEOUS SOLUTION
Ionic strength
11.0759
Osmotic coefficient
2.0008
N
Species
Moles
Molality
Activity
Act. coef.
G/RT
Na+(aq)
1
0.22059D02
0.53403D+00
0.23599D+00
0.4419
0.0000
K+ (aq)
2
0.11533D02
0.27920D+00
0.15016D01
0.0538
0.0000
Ca+2
3
0.94653D02
0.22914D+01
0.15724D+01
0.6862
0.0000
Mg+2
4
0.46407D02
0.11235D+01
0.65163D+00
0.5800
0.0000
Cl(aq)
5
0.31425D01
0.76077D+01
0.29938D+02
3.9352
0.0000
SO42 (aq)
6
0.72974D04
0.17666D01
0.64149D02
0.3631
0.0000
7
CaSO4(aq)
0.64693D04
0.15662D01
0.15662D01
1.0000
0.4410
8
MgSO4(aq)
0.87333D07
0.21142D04
0.21142D04
1.0000
5.2851
9
H2O(l)
0.22929D+00
0.65191D+00
0.0000
BALANCE
Total
Solids
Solution
Total computed
H2O
0.555084E+02
0.552791E+02
0.229289E+00
0.555084E+02
Na+
0.486950E+00
0.484744E+00
0.220592E02
0.486950E+00
K+
0.106300E01
0.947671E02
0.115329E02
0.106300E01
Ca+2
0.953000E02
0.000000E+00
0.953000E02
0.953000E02
Mg+2
0.551600E01
0.505192E01
0.464076E02
0.551600E01
Cl
0.568180E+00
0.536755E+00
0.314254E01
0.568180E+00
SO42
0.293900E01
0.292522E01
0.137754E03
0.293900E01
Number of iterations
93
55.00C (218.15 K)
Temperature
SOLID PHASES
N
Phase
Moles
G/RT
1
H2O(cr,I)
53.63903
0.5004
2
NaCl*2H2O(cr)
0.42817
0.8123
3
KCl(cr)
0.01063
1.4388
4
CaCl2*6H2O(cr)
0.00953
5.6614
5
MgCl2*12H2O(cr)
0.05516
1.5678
6
Na2SO4*10H2O(cr))
0.02939
15.0450
BALANCE
Total
Solids
Solution
Total computed
H2O
0.555084E+02
0.555084E+02
0.000000E+00
0.555084E+02
Na+
0.486950E+00
0.486950E+00
0.000000E+00
0.486950E+00
K+
0.106300E01
0.106300E01
0.000000E+00
0.106300E01
Ca+2
0.953000E02
0.953000E02
0.000000E+00
0.953000E02
Mg+2
0.551600E01
0.551600E01
0.000000E+00
0.551600E01
Cl
0.568180E+00
0.568180E+00
0.000000E+00
0.568180E+00
SO42
0.293900E01
0.293900E01
0.000000E+00
0.293900E01
Number of iterations
88
7
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