1.

U_(avg) speed of O_(2) at pi xx 10 bar pressure in a 8 litre container containg 2 moles is -

Answer»

`10^(3)` cm/sec
`sqrt10^(3)` m /sec
`10^(3)` m/sec
`sqrt(2 xx 10^(6))` m/sec

Solution :`U_(avg) = sqrt((8RT)/(pi m))`
PV = NRT
`(RT)/(m) = (PV)/(w)`
`P = 10 xx pi xx 10^(5) pa`
`U_(avvg) = sqrt((8PV)/(pi w)) = sqrt((8 xx 10 xx pi 10^(5) xx 8)/(2 xx 32 xx pi)) = 10^(3) m//s`


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