Permanently soluble nitrogen

An example of a factor influencing the diffusing molecule is whether the gases or vapour are difficult to condense or readily condensable. With gases such as oxygen, carbon dioxide and nitrogen, which are difficult to condense and where the intermolecular forces are weak, the solubility of a permanent gas in plastic is relatively low at normal temperature, i.e. usually less than 0.2%. Where condensable vapours are involved in which the intermolecular forces are stronger, then there are two possible modes of interaction. 

In solution, a dissolved trace gas in equilibrium with the atmosphere would have the same partial pressure as the gas in the air. Its absolute concentration in terms of molecules or mass per unit volume of water depends on its solubility. Gas solubility varies over many orders of magnitude depending on the affinity of water for the gas molecules and the volatility of the gas. Gases range widely in their solubility in sea water, from the permanent gases like nitrogen (N2), oxygen (O2), nitrous oxide (N2O) and methane (CH4) that have a low solubility in sea... 

This correlation does not apply to the noble gases and permanent gases, such as oxygen and nitrogen. Their solubilities in water at 25 °C are shown in Table 1.9. 

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