Henry's Law
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Henry's Law [local] describes the solubility of gases in solution.

Henry's Law: the concentration of a gas dissolved in a liquid is directly proportional to the pressure of the gas above the liquid.

Where KH is the Henry's Law constant for the gas.

Gas
Constant (atm/(mol/L))
He
2865
O2
756.7
N2
1600
H2
1228
CO2
29.76
NH3
56.9
CO
1050
N2O
41.6
NO2
86.7
Cl2
10.9

The other factor that will affect the equilibrium of gases dissolved in a solvent is temperature. Unlike most solids, gas solubility decreases as the temperature is raised.

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