The average veloctiy of an ideal gas molecule at `27^(@)C` is `0.3 m s^(-1)`. The average velocity at `927^(@)C` will be

Explanation

Average speed `u_(AV) = sqrt([(8RT)//(piM)])`
`u_(AV_(1)) = sqrt((8RT_(1))/(piM))` at temperature `T_(1)`
`u_(AV_(2)) =u_(AV_(1)) = sqrt((8RT_(1))/(piM))` at temperature `T_(2)`
`:. (uA_(V_(1)))/(u_(AV_(2)))=sqrt((T_(1))/T_(2))`
`:. (0.3)/(u_(AV_(2))) = sqrt((300)/(1200)) [:'T_(1) =300K,T_(2) =12000K]`
`:. u_(AV_(2)) = 0.6 m sec^(-1)` .