Skip to content
EvidenceHelixEvidenceLib · Scientific Encyclopedia
⌘ K

Scientific library

EvidenceLib encyclopediaAll articles A–Z2,100Open textbooks35Open-access articles1,010Cancer study catalog458How it is made

My workspace this browser

Saved pages0Notes & annotations0

Recently viewed

Explore by field

Cancer and Oncology182Genetics and Genomics170Neuroscience185Cardiovascular Medicine180Immunology162Pharmacology174Molecular Biology161Infectious Diseases150Rare and Inherited Diseases181Clinical Research173Anatomy and Physiology617Drugs and Chemicals621Psychiatry and Psychology75Public Health and Nutrition64Diagnostics and Medical Technology15
Plans & pricingCompare EvidenceHelix workspace plans
Library›Open textbooks›Chemistry 2e›Standard Thermodynamic Properties for Selected Substances

Continue where you left off ()

Explore more with EvidenceHelix Workspace

Compare studies, analyze evidence and create research reports with premium tools.

Explore Researcher plans

Chemistry 2e · Front matter

Standard Thermodynamic Properties for Selected Substances

CC BY 4.0 · OpenStax · approximately 13 min read

Learning objectives

Standard Thermodynamic Properties for Selected Substances
Substance ΔHf° (kJ mol–1) ΔGf° (kJ mol–1) S° (J K–1 mol–1)
aluminum
Al(s) 0 0 28.3
Al(g) 324.4 285.7 164.54
Al3+(aq) –531 –485 –321.7
Al2O3(s) –1676 –1582 50.92
AlF3(s) –1510.4 –1425 66.5
AlCl3(s) –704.2 –628.8 110.67
AlCl3·6H2O(s) –2691.57 –2269.40 376.56
Al2S3(s) –724.0 –492.4 116.9
Al2(SO4)3(s) –3445.06 –3506.61 239.32
antimony
Sb(s) 0 0 45.69
Sb(g) 262.34 222.17 180.16
Sb4O6(s) –1440.55 –1268.17 220.92
SbCl3(g) –313.8 –301.2 337.80
SbCl5(g) –394.34 –334.29 401.94
Sb2S3(s) –174.89 –173.64 182.00
SbCl3(s) –382.17 –323.72 184.10
SbOCl(s) –374.0 — —
arsenic
As(s) 0 0 35.1
As(g) 302.5 261.0 174.21
As4(g) 143.9 92.4 314
As4O6(s) –1313.94 –1152.52 214.22
As2O5(s) –924.87 –782.41 105.44
AsCl3(g) –261.50 –248.95 327.06
As2S3(s) –169.03 –168.62 163.59
AsH3(g) 66.44 68.93 222.78
H3AsO4(s) –906.3 — —
barium
Ba(s) 0 0 62.5
Ba(g) 180 146 170.24
Ba2+(aq) –537.6 –560.8 9.6
BaO(s) –548.0 –520.3 72.1
BaCl2(s) –855.0 –806.7 123.7
BaSO4(s) –1473.2 –1362.3 132.2
beryllium
Be(s) 0 0 9.50
Be(g) 324.3 286.6 136.27
BeO(s) –609.4 –580.1 13.8
bismuth
Bi(s) 0 0 56.74
Bi(g) 207.1 168.2 187.00
Bi2O3(s) –573.88 –493.7 151.5
BiCl3(s) –379.07 –315.06 176.98
Bi2S3(s) –143.1 –140.6 200.4
boron
B(s) 0 0 5.86
B(g) 565.0 521.0 153.4
B2O3(s) –1273.5 –1194.3 53.97
B2H6(g) 36.4 87.6 232.1
H3BO3(s) –1094.33 –968.92 88.83
BF3(g) –1136.0 –1119.4 254.4
BCl3(g) –403.8 –388.7 290.1
B3N3H6(l) –540.99 –392.79 199.58
HBO2(s) –794.25 –723.41 37.66
bromine
Br2(l) 0 0 152.23
Br2(g) 30.91 3.142 245.5
Br(g) 111.88 82.429 175.0
Br–(aq) –120.9 –102.82 80.71
BrF3(g) –255.60 –229.45 292.42
HBr(g) –36.3 –53.43 198.7
cadmium
Cd(s) 0 0 51.76
Cd(g) 112.01 77.41 167.75
Cd2+(aq) –75.90 –77.61 –73.2
CdO(s) –258.2 –228.4 54.8
CdCl2(s) –391.5 –343.9 115.3
CdSO4(s) –933.3 –822.7 123.0
CdS(s) –161.9 –156.5 64.9
calcium
Ca(s) 0 0 41.6
Ca(g) 178.2 144.3 154.88
Ca2+(aq) –542.96 –553.04 –55.2
CaO(s) –634.9 –603.3 38.1
Ca(OH)2(s) –985.2 –897.5 83.4
CaSO4(s) –1434.5 –1322.0 106.5
CaSO4·2H2O(s) –2022.63 –1797.45 194.14
CaCO3(s) (calcite) –1220.0 –1081.4 110.0
CaSO3·H2O(s) –1752.68 –1555.19 184.10
carbon
C(s) (graphite) 0 0 5.740
C(s) (diamond) 1.89 2.90 2.38
C(g) 716.681 671.2 158.1
CO(g) –110.52 –137.15 197.7
CO2(g) –393.51 –394.36 213.8
CO3 2–(aq) –677.1 –527.8 –56.9
CH4(g) –74.6 –50.5 186.3
CH3OH(l) –239.2 –166.6 126.8
CH3OH(g) –201.0 –162.3 239.9
CCl4(l) –128.2 –62.5 214.4
CCl4(g) –95.7 –58.2 309.7
CHCl3(l) –134.1 –73.7 201.7
CHCl3(g) –103.14 –70.34 295.71
CS2(l) 89.70 65.27 151.34
CS2(g) 116.9 66.8 238.0
C2H2(g) 227.4 209.2 200.9
C2H4(g) 52.4 68.4 219.3
C2H6(g) –84.0 –32.0 229.2
CH3CO2H(l) –484.3 –389.9 159.8
CH3CO2H(g) –434.84 –376.69 282.50
C2H5OH(l) –277.6 –174.8 160.7
C2H5OH(g) –234.8 –167.9 281.6
HCO3 –(aq) –691.11 –587.06 95
C3H8(g) –103.8 –23.4 270.3
C6H6(g) 82.927 129.66 269.2
C6H6(l) 49.1 124.50 173.4
CH2Cl2(l) –124.2 –63.2 177.8
CH2Cl2(g) –95.4 –65.90 270.2
CH3Cl(g) –81.9 –60.2 234.6
C2H5Cl(l) –136.52 –59.31 190.79
C2H5Cl(g) –112.17 –60.39 276.00
C2N2(g) 308.98 297.36 241.90
HCN(l) 108.9 125.0 112.8
HCN(g) 135.5 124.7 201.8
cesium
Cs+(aq) –248 –282.0 133
chlorine
Cl2(g) 0 0 223.1
Cl(g) 121.3 105.70 165.2
Cl–(aq) –167.2 –131.2 56.5
ClF(g) –54.48 –55.94 217.78
ClF3(g) –158.99 –118.83 281.50
Cl2O(g) 80.3 97.9 266.2
Cl2O7(l) 238.1 — —
Cl2O7(g) 272.0 — —
HCl(g) –92.307 –95.299 186.9
HClO4(l) –40.58 — —
chromium
Cr(s) 0 0 23.77
Cr(g) 396.6 351.8 174.50
CrO4 2–(aq) –881.2 –727.8 50.21
Cr2O7 2–(aq) –1490.3 –1301.1 261.9
Cr2O3(s) –1139.7 –1058.1 81.2
CrO3(s) –589.5 — —
(NH4)2Cr2O7(s) –1806.7 — —
cobalt
Co(s) 0 0 30.0
Co2+(aq) –67.4 –51.5 –155
Co3+(aq) 92 134 –305.0
CoO(s) –237.9 –214.2 52.97
Co3O4(s) –910.02 –794.98 114.22
Co(NO3)2(s) –420.5 — —
copper
Cu(s) 0 0 33.15
Cu(g) 338.32 298.58 166.38
Cu+(aq) 51.9 50.2 –26
Cu2+(aq) 64.77 65.49 –99.6
CuO(s) –157.3 –129.7 42.63
Cu2O(s) –168.6 –146.0 93.14
CuS(s) –53.1 –53.6 66.5
Cu2S(s) –79.5 –86.2 120.9
CuSO4(s) –771.36 –662.2 109.2
Cu(NO3)2(s) –302.9 — —
fluorine
F2(g) 0 0 202.8
F(g) 79.4 62.3 158.8
F–(aq) –332.6 –278.8 –13.8
F2O(g) 24.7 41.9 247.43
HF(g) –273.3 –275.4 173.8
hydrogen
H2(g) 0 0 130.7
H(g) 217.97 203.26 114.7
H+(aq) 0 0 0
OH–(aq) –230.0 –157.2 –10.75
H3O+(aq) –285.8 69.91
H2O(l) –285.83 –237.1 70.0
H2O(g) –241.82 –228.59 188.8
H2O2(l) –187.78 –120.35 109.6
H2O2(g) –136.3 –105.6 232.7
HF(g) –273.3 –275.4 173.8
HCl(g) –92.307 –95.299 186.9
HBr(g) –36.3 –53.43 198.7
HI(g) 26.48 1.70 206.59
H2S(g) –20.6 –33.4 205.8
H2Se(g) 29.7 15.9 219.0
HNO3 –206.64 — —
iodine
I2(s) 0 0 116.14
I2(g) 62.438 19.3 260.7
I(g) 106.84 70.2 180.8
I–(aq) –55.19 –51.57 11.13
IF(g) 95.65 –118.49 236.06
ICl(g) 17.78 –5.44 247.44
IBr(g) 40.84 3.72 258.66
IF7(g) –943.91 –818.39 346.44
HI(g) 26.48 1.70 206.59
iron
Fe(s) 0 0 27.3
Fe(g) 416.3 370.7 180.5
Fe2+(aq) –89.1 –78.90 –137.7
Fe3+(aq) –48.5 –4.7 –315.9
Fe2O3(s) –824.2 –742.2 87.40
Fe3O4(s) –1118.4 –1015.4 146.4
Fe(CO)5(l) –774.04 –705.42 338.07
Fe(CO)5(g) –733.87 –697.26 445.18
FeCl2(s) –341.79 –302.30 117.95
FeCl3(s) –399.49 –334.00 142.3
FeO(s) –272.0 –255.2 60.75
Fe(OH)2(s) –569.0 –486.5 88.
Fe(OH)3(s) –823.0 –696.5 106.7
FeS(s) –100.0 –100.4 60.29
Fe3C(s) 25.10 20.08 104.60
lead
Pb(s) 0 0 64.81
Pb(g) 195.2 162. 175.4
Pb2+(aq) –1.7 –24.43 10.5
PbO(s) (yellow) –217.32 –187.89 68.70
PbO(s) (red) –218.99 –188.93 66.5
Pb(OH)2(s) –515.9 — —
PbS(s) –100.4 –98.7 91.2
Pb(NO3)2(s) –451.9 — —
PbO2(s) –277.4 –217.3 68.6
PbCl2(s) –359.4 –314.1 136.0
lithium
Li(s) 0 0 29.1
Li(g) 159.3 126.6 138.8
Li+(aq) –278.5 –293.3 13.4
LiH(s) –90.5 –68.3 20.0
Li(OH)(s) –487.5 –441.5 42.8
LiF(s) –616.0 –587.5 35.7
Li2CO3(s) –1216.04 –1132.19 90.17
magnesium
Mg2+(aq) –466.9 –454.8 –138.1
manganese
Mn(s) 0 0 32.0
Mn(g) 280.7 238.5 173.7
Mn2+(aq) –220.8 –228.1 –73.6
MnO(s) –385.2 –362.9 59.71
MnO2(s) –520.03 –465.1 53.05
Mn2O3(s) –958.97 –881.15 110.46
Mn3O4(s) –1378.83 –1283.23 155.64
MnO4 –(aq) –541.4 –447.2 191.2
MnO4 2–(aq) –653.0 –500.7 59
mercury
Hg(l) 0 0 75.9
Hg(g) 61.4 31.8 175.0
Hg2+(aq) 164.8
Hg2+(aq) 172.4 153.9 84.5
HgO(s) (red) –90.83 –58.5 70.29
HgO(s) (yellow) –90.46 –58.43 71.13
HgCl2(s) –224.3 –178.6 146.0
Hg2Cl2(s) –265.4 –210.7 191.6
HgS(s) (red) –58.16 –50.6 82.4
HgS(s) (black) –53.56 –47.70 88.28
HgSO4(s) –707.51 –594.13 0.00
nickel
Ni2+(aq) –64.0 –46.4 –159
nitrogen
N2(g) 0 0 191.6
N(g) 472.704 455.5 153.3
NO(g) 90.25 87.6 210.8
NO2(g) 33.2 51.30 240.1
N2O(g) 81.6 103.7 220.0
N2O3(g) 83.72 139.41 312.17
NO3 –(aq) –205.0 –108.7 146.4
N2O4(g) 11.1 99.8 304.4
N2O5(g) 11.3 115.1 355.7
NH3(g) –45.9 –16.5 192.8
NH4 +(aq) –132.5 –79.31 113.4
N2H4(l) 50.63 149.43 121.21
N2H4(g) 95.4 159.4 238.5
NH4NO3(s) –365.56 –183.87 151.08
NH4Cl(s) –314.43 –202.87 94.6
NH4Br(s) –270.8 –175.2 113.0
NH4I(s) –201.4 –112.5 117.0
NH4NO2(s) –256.5 — —
HNO3(l) –174.1 –80.7 155.6
HNO3(g) –133.9 –73.5 266.9
HNO3(aq) –207.4 –110.5 146
oxygen
O2(g) 0 0 205.2
O(g) 249.17 231.7 161.1
O3(g) 142.7 163.2 238.9
phosphorus
P4(s) 0 0 164.4
P4(g) 58.91 24.4 280.0
P(g) 314.64 278.25 163.19
PH3(g) 5.4 13.5 210.2
PCl3(g) –287.0 –267.8 311.78
PCl5(g) –374.9 –305.0 364.4
P4O6(s) –1640.1 — —
P4O10(s) –2984.0 –2697.0 228.86
PO4 3–(aq) –1277 –1019 –222
HPO3(s) –948.5 — —
HPO4 2–(aq) –1292.1 –1089.3 –33
H2PO4 2–(aq) –1296.3 –1130.4 90.4
H3PO2(s) –604.6 — —
H3PO3(s) –964.4 — —
H3PO4(s) –1279.0 –1119.1 110.50
H3PO4(l) –1266.9 –1124.3 110.5
H4P2O7(s) –2241.0 — —
POCl3(l) –597.1 –520.8 222.5
POCl3(g) –558.5 –512.9 325.5
potassium
K(s) 0 0 64.7
K(g) 89.0 60.5 160.3
K+(aq) –252.4 –283.3 102.5
KF(s) –576.27 –537.75 66.57
KCl(s) –436.5 –408.5 82.6
rubidium
Rb+(aq) –246 –282.2 124
silicon
Si(s) 0 0 18.8
Si(g) 450.0 405.5 168.0
SiO2(s) –910.7 –856.3 41.5
SiH4(g) 34.3 56.9 204.6
H2SiO3(s) –1188.67 –1092.44 133.89
H4SiO4(s) –1481.14 –1333.02 192.46
SiF4(g) –1615.0 –1572.8 282.8
SiCl4(l) –687.0 –619.8 239.7
SiCl4(g) –662.75 –622.58 330.62
SiC(s, beta cubic) –73.22 –70.71 16.61
SiC(s, alpha hexagonal) –71.55 –69.04 16.48
silver
Ag(s) 0 0 42.55
Ag(g) 284.9 246.0 172.89
Ag+(aq) 105.6 77.11 72.68
Ag2O(s) –31.05 –11.20 121.3
AgCl(s) –127.0 –109.8 96.3
Ag2S(s) –32.6 –40.7 144.0
sodium
Na(s) 0 0 51.3
Na(g) 107.5 77.0 153.7
Na+(aq) –240.1 –261.9 59
Na2O(s) –414.2 –375.5 75.1
NaCl(s) –411.2 –384.1 72.1
strontium
Sr2+(aq) –545.8 –557.3 –32.6
sulfur
S8(s) (rhombic) 0 0 256.8
S(g) 278.81 238.25 167.82
S2–(aq) 41.8 83.7 22
SO2(g) –296.83 –300.1 248.2
SO3(g) –395.72 –371.06 256.76
SO4 2–(aq) –909.3 –744.5 20.1
S2O3 2–(aq) –648.5 –522.5 67
H2S(g) –20.6 –33.4 205.8
HS–(aq) –17.7 12.6 61.1
H2SO4(l) –813.989 –690.00 156.90
HSO4 –(aq) –885.75 –752.87 126.9
H2S2O7(s) –1273.6 — —
SF4(g) –728.43 –684.84 291.12
SF6(g) –1220.5 –1116.5 291.5
SCl2(l) –50 — —
SCl2(g) –19.7 — —
S2Cl2(l) –59.4 — —
S2Cl2(g) –19.50 –29.25 319.45
SOCl2(g) –212.55 –198.32 309.66
SOCl2(l) –245.6 — —
SO2Cl2(l) –394.1 — —
SO2Cl2(g) –354.80 –310.45 311.83
tin
Sn(s) 0 0 51.2
Sn(g) 301.2 266.2 168.5
SnO(s) –285.8 –256.9 56.5
SnO2(s) –577.6 –515.8 49.0
SnCl4(l) –511.3 –440.1 258.6
SnCl4(g) –471.5 –432.2 365.8
titanium
Ti(s) 0 0 30.7
Ti(g) 473.0 428.4 180.3
TiO2(s) –944.0 –888.8 50.6
TiCl4(l) –804.2 –737.2 252.4
TiCl4(g) –763.2 –726.3 353.2
tungsten
W(s) 0 0 32.6
W(g) 849.4 807.1 174.0
WO3(s) –842.9 –764.0 75.9
zinc
Zn(s) 0 0 41.6
Zn(g) 130.73 95.14 160.98
Zn2+(aq) –153.9 –147.1 –112.1
ZnO(s) –350.5 –320.5 43.7
ZnCl2(s) –415.1 –369.43 111.5
ZnS(s) –206.0 –201.3 57.7
ZnSO4(s) –982.8 –871.5 110.5
ZnCO3(s) –812.78 –731.57 82.42
complexes
[Co(NH3)4(NO2)2]NO3, cis –898.7 — —
[Co(NH3)4(NO2)2]NO3, trans –896.2 — —
NH4[Co(NH3)2(NO2)4] –837.6 — —
[Co(NH3)6][Co(NH3)2(NO2)4]3 –2733.0 — —
[Co(NH3)4Cl2]Cl, cis –874.9 — —
[Co(NH3)4Cl2]Cl, trans –877.4 — —
[Co(en)2(NO2)2]NO3, cis –689.5 — —
[Co(en)2Cl2]Cl, cis –681.2 — —
[Co(en)2Cl2]Cl, trans –677.4 — —
[Co(en)3](ClO4)3 –762.7 — —
[Co(en)3]Br2 –595.8 — —
[Co(en)3]I2 –475.3 — —
[Co(en)3]I3 –519.2 — —
[Co(NH3)6](ClO4)3 –1034.7 –221.1 615
[Co(NH3)5NO2](NO3)2 –1088.7 –412.9 331
[Co(NH3)6](NO3)3 –1282.0 –524.5 448
[Co(NH3)5Cl]Cl2 –1017.1 –582.5 366.1
[Pt(NH3)4]Cl2 –725.5 — —
[Ni(NH3)6]Cl2 –994.1 — —
[Ni(NH3)6]Br2 –923.8 — —
[Ni(NH3)6]I2 –808.3 — —
← Composition of Commercial Acids and BasesIonization Constants of Weak Acids →

Attribution. Chemistry 2e, OpenStax, Rice University, and the contributing authors credited in the book. Licensed under Creative Commons Attribution 4.0 International. Source revision 32c719622f of openstax/osbooks-chemistry-bundle (2026-02-04). CC BY 4.0. Original source ↗. Text edition of a pinned CC BY 4.0 source revision of the OpenStax book, converted from CNXML by the EvidenceHelix importer. Original prose, learning objectives, tables, exercises, glossary and captions are preserved; images are not copied (figures link to the original source and keep their credits). No new content was added. Later revisions of this book can carry different licence terms and are not used.

In this chapter Contents

  • Preface
  • The Periodic Table
  • Essential Mathematics
  • Units and Conversion Factors
  • Fundamental Physical Constants
  • Water Properties
  • Composition of Commercial Acids and Bases
  • Standard Thermodynamic Properties for Selected Substances
  • Ionization Constants of Weak Acids
  • Ionization Constants of Weak Bases
  • Solubility Products
  • Formation Constants for Complex Ions
  • Standard Electrode (Half-Cell) Potentials
  • Half-Lives for Several Radioactive Isotopes

Source

OpenStax source file ↗

Illustrated original ↗

EvidenceLib is a research-education resource, not medical advice. It does not diagnose, prescribe or recommend starting, stopping or changing any treatment. Talk to a qualified clinician about your own situation. Methods, sources and licences · Rights and removal requests · Legal · Support