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Standard Enthalpy of Formation for Compounds and Ions, Study Guides, Projects, Research of Chemistry

Brandeis UniversityChemistry

A table of standard enthalpy of formation values for various compounds and ions. The values are given in kj/mol and are listed for both compounds and their corresponding ions. The table includes a range of elements and compounds, including metals, non-metals, and ionic compounds. The document also includes notes on the temperature and pressure conditions under which the values were determined.

What you will learn

  • How does the standard enthalpy of formation for H2O(g) compare to that of H2O(l)?
  • What is the standard enthalpy of formation for Ag2O(s) and Ag2S(s) respectively?
  • What is the standard enthalpy of formation for the Al3+(aq) ion?

Typology: Study Guides, Projects, Research

2021/2022

Uploaded on 09/12/2022

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Standard Enthalpy of Formation* for Various Compounds
Compound ΔH˚f (kJ/mol) Compound ΔH˚f (kJ/mol) Compound ΔH˚f (kJ/mol) Compound ΔH˚f (kJ/mol)
Ag2O(s) −30.6 C2H5OH(l) −277.6 HCl(g) −92.3 NH4Cl(s) −315.4
Ag2S(s) −31.8 C2H6(g) −84.7 HF(g) −268.6 NH4NO3(s) −365.1
AgBr(s) −99.5 C3H8(g) −103.8 HgO(s) −90.7 NiO(s) −244.3
AgCl(s) −127.0 n-C4H10(g) −124.7 HgS(s) −58.2 NO(g) +90.4
AgI(s) −62.4 n-C5H12(l) −173.1 HI(g) +25.9 NO2(g) +33.9
Al2O3(s) −1669.8 CO(g) −110.5 HNO3(l) −173.2 Pb3O4(s) −734.7
BaCl2(s) −860.1 CO2(g) −393.5 KBr(s) −392.2 PbBr2(s) −277.0
BaCO3(s) −1218.8 CoO(s) −239.3 KCl(s) −435.9 PbCl2(s) −359.2
BaO(s) −558.1 Cr2O3(s) −1128.4 KClO3(s) −391.4 PbO(s) −217.9
BaSO4(s) −1465.2 Cu2O(s) −166.7 KF(s) −562.6 PbO2(s) −276.6
Ca(OH)2(s) −986.6 CuO(s) −155.2 Mg(OH)2(s) −924.7 PCl3(g) −306.4
CaCl2(s) −795.0 CuS(s) −48.5 MgCl2(s) −641.8 PCl5(g) −398.9
CaCO3(s) −1207.0 CuSO4(s) −769.9 MgCO3(s) −1113 SiO2(s) −859.4
CaO(s) −635.5 Fe2O3(s) −822.2 MgO(s) −601.8 SnCl2(s) −349.8
CaSO4(s) −1432.7 Fe3O4(s) −1120.9 MgSO4(s) −1278.2 SnCl4(l) −545.2
CCl4(l) −139.5 H2O(g) −241.8 MnO(s) −384.9 SnO(s) −286.2
CH3OH(l) −238.6 H2O(l) −285.8 MnO2(s) −519.7 SnO2(s) −580.7
CH4(g) −74.8 H2O2(l) −187.6 NaCl(s) −411.0 SO2(g) −296.1
CHCl3(l) −131.8 H2S(g) −20.1 NaF(s) −569.0 SO3(g) −395.2
C2H2(g) +226.7 H2SO4(l) −811.3 NaOH(s) −426.7 ZnO(s) −348.0
C2H4(g) +52.3 HBr(g) −36.2 NH3(g) −46.2 ZnS(s) −202.9
* All standard enthalpy values are at 25°C and 1 atmosphere of pressure.
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Standard Enthalpy of Formation

*****^

for Various Compounds

Compound

H

˚f (kJ/mol) Compound

H

˚f (kJ/mol) Compound

H

˚f (kJ/mol) Compound

H

˚f (kJ/mol) Ag O(s) 2

C

H 2

OH(l) 5

HCl(g)

NH

Cl(s) 4

Ag S(s) 2

C

H 2

(g) 6

HF(g)

NH

NO 4

(s) 3

AgBr(s)

C

H 3

(g) 8

HgO(s)

NiO(s)

AgCl(s)

n-C

H 4

10 (g)

HgS(s)

NO(g)

AgI(s)

n-C

H 5

12 (l)

HI(g)

NO

(g) 2

Al

O 2

(s) 3

CO(g)

HNO

(l) 3

Pb

O 3

(s) 4

BaCl (s) 2

CO

(g) 2

KBr(s)

PbBr (s) 2

BaCO (s) 3

CoO(s)

KCl(s)

PbCl (s) 2

BaO(s)

Cr

O 2

(s) 3

KClO (s) 3

PbO(s)

BaSO (s) 4

Cu O(s) 2

KF(s)

PbO (s) 2

Ca(OH) (s) 2

CuO(s)

Mg(OH) (s) 2

PCl (g) 3

CaCl (s) 2

CuS(s)

MgCl (s) 2

PCl (g) 5

CaCO (s) 3

CuSO (s) 4

MgCO (s) 3

SiO (s) 2

CaO(s)

Fe

O 2

(s) 3

MgO(s)

SnCl (s) 2

CaSO (s) 4

Fe

O 3

(s) 4

MgSO (s) 4

SnCl (l) 4

CCl (l) 4

H

O(g) 2

MnO(s)

SnO(s)

CH

OH(l) 3

H

O(l) 2

MnO (s) 2

SnO (s) 2

CH

(g) 4

H

O 2

(l) 2

NaCl(s)

SO

(g) 2

CHCl (l) 3

H

S(g) 2

NaF(s)

SO

(g) 3

C

H 2

(g) 2

H

SO 2

(l) 4

NaOH(s)

ZnO(s)

C

H 2

(g) 4

HBr(g)

NH

(g) 3

ZnS(s)

  • All standard enthalpy values are at 25 °C and 1 atmosphere of pressure.

Standard Enthalpy of Formation

*****^

for Atomic and Molecular Ions

Cations

H

˚f (kJ/mol) Cations

H

˚f (kJ/mol) Anions

H

˚f (kJ/mol) Anions

H

˚f (kJ/mol) Ag

  • (aq)

K

+(aq)

Br −(aq)

H

PO 2

− 4 (aq)

Al 3+ (aq)

Li

  • (aq)

Cl −(aq)

HPO

(^24) −(aq)

Ba 2+ (aq)

Mg 2+ (aq)

ClO − 3 (aq)

−I

(aq)

Ca 2+ (aq)

Mn 2+ (aq)

ClO − 4 (aq)

MnO − 4 (aq)

Cd 2+ (aq)

Na

  • (aq)

CO

(^23) −(aq)

NO

− 3 (aq)

Cu 2+ (aq)

NH

  • 4 (aq)

CrO (^24) −(aq)

OH

−(aq)

Fe 2+ (aq)

Ni 2+ (aq)

F

−(aq)

PO

(^34) −(aq)

Fe 3+ (aq)

Pb 2+ (aq)

HCO

− 3 (aq)

S

2 − (aq)

H

+(aq)

Sn 2+ (aq)

SO

(^24) −(aq)

Zn 2+ (aq)

  • All standard enthalpy values are at 25 °C, 1 molar concentration, and 1 atmosphere of pressure.