Greenwood and Earnshaw Fig 3.2
| Property | H2 | HD | D2 | T2 |
|---|---|---|---|---|
| m.p./K | 13.957 | 16.60 | 18.73 | 20.62 |
| b.p./K | 20.39 | 22.13 | 23.67 | 25.04 |
| ΔHfus/kJ·mol−1 | 0.117 | 0.159 | 0.197 | 0.250 |
| ΔHvap/kJ·mol−1 | 0.904 | 1.075 | 1.226 | 1.393 |
| Tc/K | 33.19 | 35.91 | 38.35 | 40.6 (calc.) |
| Pc/atm | 12.98 | 14.64 | 16.43 | 18.1 (calc.) |
| ΔHdissoc/kJ·mol−1 (at 298.2 K) | 435.88 | 439.3 | 443.35 | 446.9 |
| Zero-point energy/kJ·mol−1 | 25.9 | ??? | 18.5 | 15.1 |
| Internuclear distance/pm | 74.14 | ??? | 74.14 | (74.14) |