Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: Donica on 05/06/2009 01:32:54

Title: How does the viscosity of a gas change with temperature?
Post by: Donica on 05/06/2009 01:32:54

Pleasd help me with this question. Does gas flow more slower or faster when heated? and why? I believe it does flow slower and is more viscous. But I'm unsure of this.

Title: Re: How does the viscosity of a gas change with temperature?
Post by: Bored chemist on 05/06/2009 07:11:04

Gas viscosity rises withtemperature.
http://en.wikipedia.org/wiki/Viscosity#Effect_of_temperature_on_the_viscosity_of_a_gas

Title: How does the viscosity of a gas change with temperature?
Post by: Chemistry4me on 05/06/2009 08:57:00

Quote

While liquids get runnier as they get hotter, gases get thicker. (If one can imagine a "thick" gas.) The viscosity of gases increases as temperature increases and is approximately proportional to the square root of temperature. This is due to the increase in the frequency of intermolecular collisions at higher temperatures.

http://hypertextbook.com/physics/matter/viscosity/