Comparison of the physical properties of molecular forms of hydrogen

Comparison of the physical properties of molecular forms of hydrogen

Table
Comparison of the physical properties of molecular forms of hydrogen
ordinary hydrogen hydrogen deuteride deuterium
gram molecular volume of the solid at the triple point (cu cm) 23.25 21.84 20.48
triple point (K) 13.96 16.60 18.73
vapour pressure at triple point (mmHg) 54.0 92.8 128.6
boiling point (K) 20.39 22.13 23.67
heat of fusion at triple point (cal/mole) 28.0 38.1 47.0
heat of vaporization (cal/mole) 216* 257** 293***
*At 20.39 K.
**At 22.54 K.
***At 23.67 K.
See as table:

* * *


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