Values for 0, 15, and 25°C are taken from encyclopedia.airliquide.com

Symbol
$\lambda_{\mathrm{gas}}$
Unit
-
Choices
GasFormula0°C15°C25°C
Air-1.40281.40221.4018
N2N21.40191.40151.4013
SF6SF61.10741.10171.0984
CO2CO21.30831.29951.2941
COCO1.40211.40161.4013
O2O21.39911.39771.3967
H2H21.40981.40691.4054
NH3NH31.32721.32031.316
SO2SO21.29661.28631.2805
HeHe1.66651.66651.6665
ArAr1.67021.66981.6696
KrKr1.67341.67261.6722
XeXe1.67971.67821.6773