Thermodynamic reference states.
Integrated Heat Capacity (H(298)-H(0)) in kJ mol-1
| Element |
Reference State |
H(298)-H(0) |
unc. |
| H |
H2, g |
8.468 |
0.001 |
| D |
D2, g |
8.569 |
|
| Li |
Li, cr |
4.632 |
0.040 |
| Be |
Be, cr |
1.950 |
0.020 |
| B |
B, cr |
1.222 |
0.008 |
| C |
C, cr graphite |
1.050 |
0.020 |
| N |
N2, g |
8.670 |
0.001 |
| O |
O2, g |
8.680 |
0.002 |
| F |
F2, g |
8.825 |
0.001 |
| Na |
Na, cr |
6.460 |
0.020 |
| Mg |
Mg, cr |
4.998 |
0.030 |
| Al |
Al, cr |
4.540 |
0.020 |
| Si |
Si, cr |
3.217 |
0.008 |
| P |
P, cr white |
5.360 |
0.002 |
| S |
S, cr rhombic |
4.412 |
0.006 |
| Cl |
Cl2, g |
9.181 |
0.001 |
| Ti |
Ti, cr |
4.824 |
0.015 |
| Cu |
Cu, cr |
5.004 |
0.008 |
| Br |
Br2, l |
24.520 |
0.010 |
Data from CODATA
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.CODATA Key Values for Thermodynamics. Hemisphere, New York, 1989
For gas-phase species with well defined enthalpies of formation
that are useful in calculating reactions see section
VII.C.2 Species with well-known enthalpies of formation
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