Standard enthalpy change of formation (data table)

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These tables include heat of formation data gathered from a variety of sources, including the primary and secondary literature, as well as the NIST Chemistry WebBook. Note that the table for Alkanes contains ΔfH o values in kcal/mol (1 kcal/mol = 4.184 kJ/mol), and the table for Miscellaneous Compounds and Elements contains these values in kJ/mol.

Alkanes[edit]

FormulaNameChemical FormulaΔfH o (kcal/mol)CAS registry numberΔfH o (kJ/mol)
H2Hydrogen[H][H]0.0001333-74-00.0
CH4MethaneC-17.9000074-82-8-74.9
C2H6EthaneCC-20.0000074-84-0-83.7
C2H2AcetyleneCC+54.2000074-86-2226.8
C3H8n-PropaneCCC-25.0000074-98-6-104.6
C4H10n-ButaneCCCC-30.0000106-97-8-125.5
C5H12n-PentaneCCCCC-35.1000109-66-0-146.9
C6H14n-HexaneCCCCCC-40.0000110-54-3-167.4
C7H16n-HeptaneCCCCCCC-44.9000142-82-5-187.9
C8H18n-OctaneCCCCCCCC-49.8000111-65-9-208.4
C9H20n-NonaneCCCCCCCCC-54.8000111-84-2-229.3
C10H22n-DecaneCCCCCCCCCC-59.6000124-18-5-249.4
C4H10Isobutane (methylpropane)CC(C)C-32.1000075-28-5-134.3
C5H12Neopentane (dimethylpropane)CC(C)(C)C-40.1000463-82-1-167.8
C5H12Isopentane (methylbutane)CCC(C)C-36.9000078-78-4-154.4
C6H142,2-DimethylbutaneCCC(C)(C)C-44.5000075-83-2-186.2
C6H142-Methylpentane (isohexane)CCCC(C)C-41.8000107-83-5-174.9
C6H143-MethylpentaneCCC(C)CC-41.1000096-14-0-172.0
C6H142,3-DimethylbutaneCC(C)C(C)C-42.5000079-29-8-177.8
C7H162,2,3-TrimethylbutaneCC(C)C(C)(C)C-49.0000464-06-2-205.0
C7H163-ethylpentaneCCC(CC)CC-45.3000617-78-7-189.5
C8H182,2,3,3-TetramethylbutaneCC(C)(C)C(C)(C)C-53.9000594-82-1-225.5
C7H162-MethylhexaneCCCCC(C)C-46.5000591-76-4-194.6
C7H163-MethylhexaneCCCC(C)CC-45.7000589-34-4-191.2
C7H162,2-DimethylpentaneCCCC(C)(C)C-49.2000590-35-2-205.9
C7H163,3-DimethylpentaneCCC(C)(C)CC-48.1000562-49-2-201.3
C7H162,3-DimethylpentaneCCC(C)C(C)C-47.3000565-59-3-197.9
C7H162,4-DimethylpentaneCC(C)CC(C)C-48.2000108-08-7-201.7
C8H182-MethylheptaneCCCCCC(C)C-51.5000592-27-8-215.5
C8H182,2-DimethylhexaneCCCCC(C)(C)C-53.7000590-73-8-224.7
C8H182,3-DimethylhexaneCCCC(C)C(C)C-55.1000584-94-1-230.5
C8H182,4-DimethylhexaneCCC(C)CC(C)C-52.4000589-43-5-219.2
C8H182,5-DimethylhexaneCC(C)CCC(C)C-53.2000592-13-2-222.6
C8H183,3-DimethylhexaneCCCC(C)(C)CC-52.6000563-16-6-220.1
C8H183,4-DimethylhexaneCCC(C)C(C)CC-50.9000583-48-2-213.0
C8H183-Ethyl-2-MethylpentaneCCC(CC)C(C)C-50.4000609-26-7-210.9
C8H183-Ethyl-3-MethylpentaneCCC(C)(CC)CC-51.4001067-08-9-215.1
C8H182,2,3-TrimethylpentaneCCC(C)C(C)(C)C-52.6000564-02-3-220.1
C8H182,2,4-Trimethylpentane (isooctane)CC(C)CC(C)(C)C-53.5000540-84-1-223.8
C8H182,3,3-TrimethylpentaneCCC(C)(C)C(C)C-51.7000560-21-4-216.3
C8H182,3,4-TrimethylpentaneCC(C)C(C)C(C)C-51.9000565-75-3-217.1
C9H203,3-DiethylpentaneCCC(CC)(CC)CC-55.7001067-20-5-233.0
C9H202,2,3,3-TetramethylpentaneCCC(C)(C)C(C)(C)C-56.7007154-79-2-237.2
C9H202,2,3,4-TetramethylpentaneCC(C)C(C)C(C)(C)C-56.6001186-53-4-236.8
C9H202,2,4,4-TetramethylpentaneCC(C)(C)CC(C)(C)C-57.8001070-87-7-241.8
C9H202,3,3,4-TetramethylpentaneCC(C)C(C)(C)C(C)C-56.4016747-38-9-236.0

Miscellaneous Compounds[edit]

Thermochemical Properties of selected substances at 298 K and 1 atm.

SpeciesPhase(Matter)Chemical FormulaΔfH o (kJ/mol)
Aluminum
AluminumSolidAl0
Aluminum ChlorideSolidAlCl3−705.63
Aluminum oxideSolidAl2O3−1669.8
Aluminum hydroxideSolidAl(OH)3−1277
Aluminum sulphateSolidAl2(SO4)3−3440
Barium
Barium ChlorideSolidBaCl2−858.6
Barium CarbonateSolidBaCO3−1213
Barium hydroxideSolidBa(OH)2−944.7
Barium OxideSolidBaO−548.1
Barium SulfateSolidBaSO4−1473.2
Beryllium
BerylliumSolidBe0
Beryllium HydroxideSolidBe(OH)2−902.5
Beryllium oxideSolidBeO−609.4(25)
Boron
Boron TrichlorideSolidBCl3−402.96
Bromine
BromineLiquidBr20
BromineLiquidBr−121
BromineGasBr111.884
BromineGasBr230.91
Bromine trifluorideGasBrF3−255.60
Hydrobromic acidGasHBr−36.29
Cadmium
CadmiumSolidCd0
Cadmium OxideSolidCdO−258
Cadmium HydroxideSolidCd(OH)2−561
Cadmium SulfideSolidCdS−162
Cadmium SulfateSolidCdSO4−935
Calcium
CalciumSolidCa0
CalciumGasCa178.2
Calcium(II) IonGasCa2+1925.90
Calcium carbideSolidCaC2−59.8
Calcium Carbonate(Calcite)SolidCaCO3−1206.9
Calcium ChlorideSolidCaCl2−795.8
Calcium ChlorideAqueousCaCl2−877.3
Calcium PhosphateSolidCa3(PO4)2−4132
Calcium FluorideSolidCaF2−1219.6
Calcium HydrideSolidCaH2−186.2
Calcium hydroxideSolidCa(OH)2−986.09
Calcium hydroxideAqueousCa(OH)2−1002.82
Calcium OxideSolidCaO−635.09
Calcium SulfateSolidCaSO4−1434.52
Calcium SulfideSolidCaS−482.4
Wollastonite (Calcium Inosilicate Mineral)SolidCaSiO3−1630
CarbonAlkanes Above
BenzeneLiquidC6H648.95
Benzoic acidSolidC7H6O2−385.2
GlucoseSolidC6H12O6−1271
Carbon(Graphite)SolidC0
Carbon(Diamond)SolidC1.8
CarbonGasC716.67
Carbon DioxideGasCO2−393.509
Carbon disulfideLiquidCS289.41
Carbon disulfideGasCS2116.7
Carbon MonoxideGasCO−110.525
Carbon tetrachlorideLiquidCCl4−139.5
Carbon tetrachlorideGasCCl4−103.18
Carbonyl Chloride(Phosgene)GasCOCl2−218.8
EthaneGasC2H6−83.85
EthanolLiquidC2H5OH−277.0
EthanolGasC2H5OH−235.3
EtheneGasC2H452.3
Vinyl ChlorideSolidC2H3Cl−94.12
EthyneGasC2H2226.73
MethaneGasCH4−74.87
Methanol(Methyl Alcohol)LiquidCH3OH−238.4
Methanol(Methyl Alcohol)GasCH3OH−201.0
Methyl Linoleate (Biodiesel)GasC19H34O2−356.3
Methyl Trichloride(Chloroform)LiquidCHCl3−134.47
Methyl Trichloride(Chloroform)GasCHCl3−103.18
PropaneGasC3H8−104.7
Cesium
CesiumSolidCs0
CesiumGasCs76.50
CesiumLiquidCs2.09
Cesium(I) ionGasCs+457.964
Cesium chlorideSolidCsCl−443.04
Chlorine
Monatomic ChlorineGasCl121.7
Chloride IonAqueousCl−167.2
ChlorineGasCl20
Chromium
ChromiumSolidCr0
Copper
CopperSolidCu0
Copper-OxideSolidCuO−155.2
Fluorine
FluorineGasF20
Hydrogen
Monatomic hydrogenGasH218
HydrogenGasH20
WaterGasH2O−241.818
WaterLiquidH2O−285.8
Hydrogen PeroxideLiquidH2O2−187.8
Phosphoric AcidLiquidH3PO4−1288
Hydrogen CyanideGasHCN+130.5
Hydrogen bromideLiquidHBr−36.3
Hydrogen ChlorideGasHCl−92.30
Hydrogen ChlorideAqueousHCl−167.2
Hydrogen FluorideGasHF−269
Hydrogen IodideGasHI+26.5
Iodine
IodineSolidI20
IodineGasI262.438
IodineAqueousI223
Iodine IonAqueousI−55
Iron
IronSolidFe0
Iron Carbide (Cementite)SolidFe3C5.4
Iron(II) Carbonate (Siderite)SolidFeCO3-750.6
Iron(III) ChlorideSolidFeCl3−399.4
Iron(II) Oxide (Wüstite)SolidFeO−272
Iron(II,III) Oxide (Magnetite)SolidFe3O4−1118
Iron(III) Oxide (Hematite)SolidFe2O3−826
Iron(II) SulfateSolidFeSO4−929
Iron(III) SulfateSolidFe2(SO4)3−2583
Iron(II) SulfideSolidFeS−102
Iron PyriteSolidFeS2−178
Lead
LeadSolidPb0
Lead DioxideSolidPbO2−277
Lead SulfideSolidPbS−100
Lead SulfateSolidPbSO4−920
Lead(II) nitrateSolidPb(NO3)2−452
Lead(II) sulfateSolidPbSO4−920
Magnesium
MagnesiumSolidMg0
Magnesium CarbonateSolidMgCO3−1095.797
Magnesium ChlorideSolidMgCl2−641.8
Magnesium hydroxideSolidMg(OH)2−924.54
Magnesium hydroxideAqueousMg(OH)2−926.8
Magnesium OxideSolidMgO−601.24
Magnesium sulfateSolidMgSO4−1278.2
Manganese
ManganeseSolidMn0
Manganese(II) oxideSolidMnO−384.9
Manganese(IV) OxideSolidMnO2−519.7
Manganese(III) OxideSolidMn2O3−971
Manganese(2/3) OxideSolidMn3O4−1387
PermanganateAqueousMnO4−543
Mercury
Mercury(II) Oxide (red)SolidHgO−90.83
Mercury Sulfide (red, cinnabar)SolidHgS−58.2
Nickel
Nitrogen
AmmoniaAqueousNH3−80.8
AmmoniaGasNH3−45.90
Ammonium ChlorideSolidNH4Cl−314.55
Nitrogen DioxideGasNO233.2
Nitrous OxideGasN2O82.05
Nitrogen MonoxideGasNO90.29
Dinitrogen tetraoxideGasN2O49.16
Dinitrogen pentoxideSolidN2O5−43.1
Dinitrogen pentoxideGasN2O511.3
Oxygen
Monatomic oxygenGasO249
OxygenGasO20
OzoneGasO3143
Phosphorus
Phosphorus trichlorideLiquidPCl3−319.7
Phosphorus trichlorideGasPCl3−278
Phosphorus pentachlorideSolidPCl5−440
Potassium
Potassium BromideSolidKBr−392.2
Potassium CarbonateSolidK2CO3−1150
Potassium ChlorateSolidKClO3−391.4
Potassium ChlorideSolidKCl−436.68
Potassium FluorideSolidKF−562.6
Potassium OxideSolidK2O−363
Potassium perchlorateSolidKClO4−430.12
Silicon
SiliconGasSi368.2
Silicon CarbideSolidSiC−73.22
Silicon TetrachlorideLiquidSiCl4−640.1
Silica (Quartz)SolidSiO2−910.86
Silver
Silver BromideSolidAgBr−99.5
Silver ChlorideSolidAgCl−127.01
Silver IodideSolidAgI−62.4
Silver OxideSolidAg2O−31.1
Silver SulfideSolidAg2S−31.8
Sodium
Sodium CarbonateSolidNa2CO3−1130.77
Sodium chlorideAqueousNaCl−407.27
Sodium chlorideSolidNaCl−411.12
Sodium chlorideLiquidNaCl−385.92
Sodium chlorideGasNaCl−181.42
Sodium FluorideSolidNaF−569.0
Sodium HydroxideAqueousNaOH−469.15
Sodium HydroxideSolidNaOH−425.93
Sodium nitrateAqueousNaNO3−446.2
Sodium nitrateSolidNaNO3−424.8
Sodium oxideSolidNa2O−414.2
Sulfur
Hydrogen SulfideGasH2S−20.63
Sulfur DioxideGasSO2−296.84
Sulfuric acidLiquidH2SO4−814
Tin
Titanium
TitaniumGasTi468
Titanium tetrachlorideGasTiCl4−763.2
Titanium tetrachlorideLiquidTiCl4−804.2
Titanium dioxideSolidTiO2−944.7
Zinc
ZincGasZn130.7
Zinc ChlorideSolidZnCl2−415.1
Zinc OxideSolidZnO−348.0
CO2 (aq, unionized)AqueousCO2(aq)−419.26
HCO3[[HCO3]]−689.93
Carbon trioxide[[CO3]]−675.23

References[edit]

External links[edit]