Why the viscosity of gases increases with increase in temperature?

Answer 1

Using the 5 characteristics of matter. the particles simply speed up, and the atrractive forces weaken. Thus, there are mroe spaces in between and there is less friction between the particles when you pour them.

Answer 2

Viscosity of gases increases with the increases in temperature because the rate of collision between the molecules increases per unit time and as we know their is no effect of inter molecular forces in gases so their viscosity increases.

Answer 3

Are you sure about that? - a gel is essentially a semi-solid liquid - as you heat it it would melt - moving further into the liquid phase, liquids are significantly less viscous than solids.

Unless you're trying to make a Xerogel by slowly exposing it to heat to make it dry out - moving it into more of a solid phase?

If it's becoming thixotropic then you're holding it the wrong way ;)

Answer 4

Generally, viscosity decreases when temperature increases.