How does the solubility of nitrogen (N2) in beer compare to carbon dioxide (CO2)?

The solubility of nitrogen (N2) in beer is indeed less than that of carbon dioxide (CO2). This difference is primarily due to the distinct chemical properties and behaviors of these gases when dissolved in liquid.

Carbon dioxide is highly soluble in water and other liquids due to its ability to form weak acids (such as carbonic acid) when it dissolves, which contributes to its solubility. This characteristic allows CO2 to effectively carbonate beverages, making it a crucial component of beer carbonation.

On the other hand, nitrogen does not react with water in the same way that CO2 does; it remains largely inert when dissolved. This results in nitrogen being significantly less soluble compared to carbon dioxide in liquid media. As a result, when nitrogen is introduced into beer — for example, in nitrogen-infused stouts — it contributes to a creamy mouthfeel and smooth texture but does not directly aid in carbonation.

Recognizing this difference is vital for understanding the properties and effects of various gases used in brewing and serving beer.