Henrys Law Constants: hydrogen to neon
Henry's Law constants for gas solubility in water — solubility form H_cp [mol/L/atm], volatility form H_kH [atm·L/mol], dimensionless form H_cc, and van't Hoff temperature-dependence parameter d(lnH)/d(1/T) [K]; covers 20 gases at 25°C reference in water; per Sander (2023) Atmos. Chem. Phys. compilation
| gas | H cp mol per L atm (mol/L/atm) | H dimensionless (dimensionless) | H kH atm L per mol (atm·L/mol) | dln H d 1 T K (K) | formula | notes | solvent | temperature C (C) |
|---|---|---|---|---|---|---|---|---|
| hydrogen | 0.000791 | 51.72 | 1,265 | 530 | H2 | Sparingly soluble; H at 298K from Fernandez-Prini et al. 2003 | water | 25 |
| hydrogen_chloride | 1,520 | 0.000027 | 0.000658 | 2,000 | HCl | Extremely soluble; nearly completely ionizes; physical solubility at low concentration | water | 25 |
| hydrogen_sulfide | 0.1013 | 0.4035 | 9.869 | 2,100 | H2S | Toxic; weak acid in solution; H_cp is undissociated H2S only; prefers liquid phase | water | 25 |
| methane | 0.001419 | 28.82 | 704.9 | 1,600 | CH4 | Natural gas component; sparingly soluble; H same as Ar by coincidence | water | 25 |
| neon | 0.000456 | 89.64 | 2,193 | 430 | Ne | Noble gas; very sparingly soluble | water | 25 |
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