Rotational Linear, Nonlinear

[marlene 1K]

How do we know when to use the Um equations for rotational nonlinear vs linear? I know one is =RT and the other is =3/2RT, but I'm curious as to how we approach one of these problems and what equation to use, if we're encountering these often that is.

[Jay Solanki 3A]

It depends on the shape of the molecule. O2, for example, is linear so we would apply 3/2 RT. SO2 is nonlinear, so we would apply the other option. Hope this helps!

[edward_brodell_2I]

Based on the molecular shape if it is bent or linear you would use the corresponding equation. From lewis structures and VSEPR we want to find out how many lone pairs there are and how the electrons repel. In NO2 it is an AB2 molecule and theres a lone pair electron so its nonlinear so then you would use the corresponding equation.