User:Double sharp/Hydrogen

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)