Question

When liquid air is warmed, which gas comes out first, Nitrogen or Oxygen?

Answer 1

• Air is a mixture of Oxygen$\left({\mathrm{O}}_2\right)$, Nitrogen$\left({\mathrm{N}}_2\right)$, Carbon dioxide$\left({\mathrm{CO}}_2\right)$, Water vapor, and Noble gases.
• These gases can be separated by the cooling and fractional distillation of the liquid air as these are having different boiling points.
• When liquid air is warmed, Nitrogen$\left({\mathrm{N}}_2\right)$ gas comes out first, followed by Argon$\left(\mathrm{Ar}\right)$, and then Oxygen$\left({\mathrm{O}}_2\right)$.