How are they able to get so much gas in the liquid in a soda can? Well, that's because they decreased the volume to such a small volume found above the liquid that the increase in pressure Increase in pressure. Causes solubility of the gas to increase. And so a lot of the carbon dioxide found above the liquid in a soda can dissolves in the liquid. But when you open the liquid, the pressure decreases because there's an influx or an alflux of molecules out of the can. And therefore the alflux creates a lower pressure.