This table is valid for the temperature 25 C
Chemical Substance (state) |
∆Hf◦ (kJ/mol) |
Ag(s) |
0 |
Ag+(aq) |
105 |
AgBr(s) |
-100 |
AgCN(s) |
164 |
AgCl(s) |
-128 |
Ag2CrO4(s) |
-712 |
AgI(s) |
-62 |
Ag2O(s) |
-32 |
Ag2S(s) |
-40 |
Al(s) |
0 |
Al2O3(s) |
-1675 |
Al(OH)3(s) |
-1276 |
AlCl3(s) |
-704 |
Al2(SO4)3 (s) |
-3440 |
Ba(s) |
0 |
BaCO3(s) |
-1220 |
BaO(s) |
-582 |
Ba(OH)2(s) |
-945 |
BaSO4(s) |
-1465 |
BaCl2(s) |
-858 |
Be(s) |
0 |
BeO(s) |
-600 |
Be(OH)2(s) |
-903 |
Br2(l) |
0 |
Br2(g) |
31 |
Br2(aq) |
-3 |
BrF3 (g) |
-255 |
Br–(aq) |
-120 |
Cd(s) |
0 |
CdO(s) |
-259 |
Cd(OH)2(s) |
-560 |
CdS(s) |
-162 |
CdSO4(s) |
-935 |
Ca(s) |
0 |
Ca2+(g) |
1925 |
CaC2(s) |
-63 |
CaCl2(s) |
-796 |
CaCl2(aq) |
-877 |
CaCO3(s) |
-1206 |
CaF2(s) |
-1220 |
CaH2(s) |
-186 |
CaO(s) |
-635 |
Ca(OH)2(s) |
-985 |
Ca(OH)2(aq) |
-1003 |
Ca3(PO4)2(s) |
-4125 |
CaSO4(s) |
-1435 |
CaSiO3(s) |
-1630 |
C(s) graphite |
0 |
C(s) diamond |
2 |
CO(g) |
-110 |
CO2(g) |
-394 |
CS2(l) |
89 |
CS2(g) |
117 |
CH4(g) |
-75 |
CH3OH(g) |
-200 |
CH3OH(l) |
-240 |
CH2O(g) |
-115 |
CHOOH(g) |
-363 |
CHN(g) |
135 |
C2H2(g) |
227 |
C2H4(g) |
52 |
CH3CHO(g) |
-165 |
C2H5OH(l) |
-278 |
C2H6(g) |
-85 |
C3H6(g) |
21 |
C3H8(g) |
-105 |
C2H4O(g) |
-53 |
CH3COOH(l) |
-485 |
C6H12O6(s) glucose |
-1275 |
CCl4(l) |
-135 |
CCl4(g) |
-104 |
Cs(s) |
0 |
Cs(g) |
76 |
Cs(l) |
2 |
Cs+(g) |
458 |
CsCl(s) |
-443 |
Cl2(g) |
0 |
Cl2(aq) |
-23 |
Cl–(aq) |
-165 |
Cr(s) |
0 |
Cr2O3(s) |
-1128 |
CrO3(s) |
-580 |
Cu(s) |
0 |
CuCO3(s) |
-595 |
Cu2O(s) |
-170 |
CuO(s) |
-156 |
Cu(OH)2(s) |
-450 |
CuS(s) |
-50 |
F2(g) |
0 |
F–(aq) |
-333 |
Fe(s) |
0 |
Fe3C(s) |
20 |
FeCl3(s) |
-400 |
FeO(s) |
-272 |
Fe3O4(s) |
-1118 |
Fe2O3(s) |
-825 |
FeS(s) |
-96 |
FeS2(s) |
-178 |
FeSO4(s) |
-929 |
HBr(g) |
-35 |
HCl(g) |
-92 |
HF(g) |
-270 |
H2(g) |
0 |
H(g) |
217 |
H+(g) |
0 |
HCN(g) |
130 |
OH–(g) |
-230 |
H2O(l) |
-286 |
H2O(g) |
-242 |
H2S(g) |
-20 |
H2SO4(l) |
-813 |
H2SO4(aq) |
-908 |
H3PO4(s) |
-1280 |
H3PO4(l) |
-1267 |
H3PO4(aq) |
-1288 |
HI(g) |
27 |
HNO3(aq) |
-207 |
HNO3(l) |
-175 |
Hg(l) |
0 |
Hg2Cl2(s) |
-265 |
HgCl2(s) |
-230 |
HgO(s) |
-90 |
HgS(s) |
-60 |
I2(s) |
0 |
I2(g) |
62 |
I2(aq) |
23 |
I–(aq) |
-55 |
K(s) |
0 |
KBr(s) |
-392 |
KCl(s) |
-435 |
KF(s) |
-563 |
KClO3(s) |
-390 |
KClO4(s) |
-433 |
K2O(s) |
-360 |
KOH(s) |
-425 |
KOH(aq) |
-480 |
Mg(s) |
0 |
MgCO3(s) |
-1112 |
MgCl2(s) |
-642 |
MgO(s) |
-600 |
Mg(OH)2(s) |
-925 |
Mg(OH)2(aq) |
-927 |
MgSO4(s) |
-1278 |
Mn(s) |
0 |
MnO(s) |
-385 |
Mn3O4(s) |
-1387 |
Mn2O3(s) |
970 |
MnO2(s) |
-520 |
MnO4–(aq) |
-543 |
N2(g) |
0 |
NH3(aq) |
-80 |
NH4+(aq) |
-132 |
NO(g) |
90 |
NO2(g) |
35 |
N2O(g) |
82 |
N2O4(g) |
10 |
N2O4(l) |
-20 |
N2O5(s) |
-42 |
N2H4(l) |
50 |
N2H3CH3(l) |
54 |
NH4ClO4(s) |
-295 |
NH4Cl(s) |
-315 |
Na(s) |
0 |
Na+(aq) |
-240 |
NaBr(s) |
-360 |
Na2CO3(s) |
-1130 |
NaHCO3(s) |
-948 |
NaCl(s) |
-386 |
NaH(s) |
-55 |
NaI(s) |
-288 |
NaNO2(s) |
-360 |
NaNO3(s) |
-467 |
NaNO3(aq) |
-469 |
Na2O(s) |
-415 |
Na2O2(s) |
-515 |
NaOH(s) |
-427 |
NaOH(aq) |
-470 |
Ni(s) |
0 |
NiCl2(s) |
-315 |
NiO(s) |
-240 |
Ni(OH)2(s) |
-538 |
NiS(s) |
-93 |
O2(g) |
0 |
O(g) |
250 |
O3(g) |
143 |
P(s) |
0 |
P4(g) |
60 |
PF5(g) |
-1578 |
PCl3(l) |
-320 |
PCl5(s) |
-440 |
PH3(g) |
5 |
P4O10(s) |
-2985 |
Pb(s) |
0 |
PbO2(s) |
-277 |
PbS(s) |
-100 |
PbSO4(s) |
-920 |
Pb(NO3)2(s) |
-452 |
S(s) |
0 |
S2-(aq) |
33 |
S8(g) |
102 |
SF6(g) |
-1208 |
SO2(g) |
-300 |
SO3(g) |
-395 |
SO42-(aq) |
-910 |
Si(g) |
368 |
SiC(s) |
-73 |
SiO2(s) |
-911 |
SiCl4(l) |
-687 |
Sn(s) |
0 |
SnO(s) |
-285 |
SnO2(s) |
-580 |
Sn(OH)2(s) |
-560 |
TiCl4(g) |
-763 |
TiO2(s) |
-945 |
U(s) |
0 |
UF6(s) |
-2137 |
UF6(g) |
-2113 |
UO2(s) |
-1084 |
U3O8(s) |
-3575 |
UO3(s) |
-1230 |
Xe(g) |
0 |
XeF2(g) |
-108 |
XeF4(s) |
-250 |
XeF6(g) |
-294 |
XeOa(s) |
402 |
Zn(s) |
0 |
ZnO(s) |
-348 |
Zn(OH)2(s) |
-642 |
ZnS(s) |
-195 |
ZnSO4(s) |
-983 |