# Most probable speed of aluminium atoms

by Bugsy23
Tags: aluminium, atoms, probable, speed
 P: 25 1. The problem statement, all variables and given/known data Aluminium atoms at 1173K enter a vacuum chamber. Calculate the most probable speed for the atoms. 2. Relevant equations vmp=$$\sqrt{}$$(2kT/m) 3. The attempt at a solution The molar mass of aluminium is 0.0270kg mol^-1, so vmp=$$\sqrt{}$$(2*1.381*10^-23JK^-1)*1173K/0.0270kg mol^-1=1.1*10^-9ms^-1 Which is a really tiny quantity and it seems unrealistic that particles at such a high temperature would move that slowly. I've used SI units though so I can't see where I would have gone wrong. Any help would be appreciated. Thanks
 Quote by Bugsy23 The molar mass of aluminium is 0.0270kg mol^-1, so vmp=$$\sqrt{}$$(2*1.381*10^-23JK^-1)*1173K/0.0270kg mol^-1=1.1*10^-9ms^-1