dn(v) exp 4πv2dv 2TRB nof(v)vdv Maxwell speed distribution Most probable speed For one molecule, what speed is most possible? Among N molecules, what is the speed most molecules have in unit interval?v v k T m v k T m n v n 4 d 2 1 exp 2 d ( ) 2 B 2 3 2 B 0              −          = Maxwell speed distribution For one molecule, what speed is most possible? Most probable speed n f (v)4 v dv 2  0  Among N molecules, what is the speed most molecules have in unit interval?