Behind him, the gas was dissolving into the air; but that offered no relief.

Atmospheric gas present in that air space may also dissolve into the water sample.

After a while no more gas can dissolve at that pressure.

This makes more gas dissolve in the diver.

Alternatively, if we turn everything to gas, then the gases will dissolve with each other (since enthalpy is no longer an issue).

Shaking the dispenser a few times helps the gas dissolve.

Many minerals and gases will readily dissolve in water.

All that gas dissolved in the northern sea-- when it comes out of solution, the air pressure rises.

That is because the lower the temperature and the higher the pressure, the more gas will dissolve into the liquid.

Generally speaking, the higher the temperature of a solution becomes, the less a gas dissolves provided it doesn't react with the solvent.