Question

Root mean square velocity -
( V_{r m s}=sqrt{frac{3 R T}{M}} )
( =sqrt{frac{3 P}{rho}} )
wherein
( mathrm{R}= ) Universal gas constant
( mathrm{M}= ) molar mass
( mathrm{P}= ) pressure due to gas
( rho= ) density
( V_{r m s}=sqrt{frac{3 R T}{M}} )
( frac{V_{r m s}(H e)}{V_{r m s}(A r)}=sqrt{frac{M_{A r}}{M_{H e}}}=sqrt{frac{40}{4}}=sqrt{10} )
( =3.16 )

# A mixture of 2 moles of helium gas (atomic mass = 4 amu) and 1 mole of argon gas (atomic mass = 40 amu) is kept at 300K in a container. The ratio of their rms Vms (helium speeds Vms (argon)] 10.32 3 2.24 20.45 4 3.16

Solution