Viscosity - Molecular origins - Gases - Effect of temperature on the viscosity of a gas

Sutherland's constant, reference values and λ values for some gases:

Reference 1: C (K), T0 (K), μ0 (μPa·s) and λ (μPa·s·K− 1⁄2).

Reference 2: air, nitrogen, oxygen, carbon dioxide, carbon monoxide, hydrogen, ammonia, sulfur dioxide and helium.

Source: http://en.wikipedia.org/wiki/Viscous