Standard Heats of Formation
| Substance | rHof (kJ/mol) |
| Al203 (s) | -1676.0 |
| Br2 (g) | 30.91 |
| C (s, diamond) | 1.9 |
| C (s, graphite) | 0.0 |
| CH4 (g) | -74.86 |
| CO (g) | -110.5 |
| CO2 (g) | -393.5 |
| CaCO3 (s) | -1270.0 |
| CaO (s) | -635.1 |
| Cl2 (g) | 0.0 |
| F2 (g) | 0.0 |
| Fe (s) | 0.0 |
| Fe2O3 (s) | -822.1 |
| H2 (g) | 0.0 |
| H2O (g) | -241.8 |
| H2O (l) | -285.8 |
| H2O2 (g) | -187.8 |
| HCl (g) | -92.31 |
| H2S (g) | -20.1 |
| I2 (g) | 62.4 |
| I2 (s) | 0.0 |
| N2 (g) | 0.0 |
| NH3(g) | -46.19 |
| NO (g) | 90.37 |
| NO2 (g) | 33.85 |
| Na2CO3 (s) | -1131.1 |
| NaCl (s) | -411.2 |
| O2 (g) | 0.0 |
| O3 (g) | 142.0 |
| P (s, white) | 0.0 |
| P (s, red) | -18.4 |
| S (s, rhombic) | 0.0 |
| S (s, monoclinic) | 0.30 |
| SO2 (g) | -296.8 |
| SO3 (g) | -395.7 |