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How does viscosity of gases vary with temperature ?
The viscosity of gases is, in general, increasing with temperature. The additional movement of the gas molecules is actually causing more contact, thus interaction in between molecules leading to an increase in viscosity.
This page is detailing the viscosity in between -150°c and +600°c for common gases : Oxygen, Air, Nitrogen, Carbon Dioxide, Steam, Hydrogen.
|Viscosity in mPa.s or cP|
|Temperature in celsius||Oxygen||Air||Nitrogen||Carbon Dioxide||Steam Water||Hydrogen|
Note : Approximate values
How does viscosity of gases vary with pressure ?
If the pressure increases, gases viscosity is usually increasing as well.