Which component of air is remove when air is pass through aqueous sodium hydroxide?

            Carbon dioxide (CO₂) of air is remove when air is pass through aqueous sodium hydroxide.

Detail:
          This method for capturing CO₂ from air or from any other source was developed by two scientists names as Lackner and Zeman. This methodology is very helpful from stopping CO₂ to enter our atmosphere and result in Global warming. The reaction of NaOH with CO₂ is as follow,

                         2 NaOH  +  CO₂      →       Na₂CO₃  +  H₂O

This is a type of liquid gas reaction and evolves around 5.3 kJ/mol heat.

Density and pressure