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CBSE Class 11-science Answered

A gas in a closed vessel is at pressure P.If the mass of all the molecules be made half and speeds doubled find resultant pressure.
Asked by Bidyashree Rout | 17 Feb, 2014, 07:59: AM
answered-by-expert Expert Answer
Let the volume of the closed vessel to be 'v'.
Let mass = M and velocity = v
According to kinetic theory of gases,
 
P = [(1/3) Mv2] / V
Now, if mass is halfed and speed is doubled,
Resultant pressure
P' = [(1/3) (1/2)M(2v)2] / V
or, P' = (2/3) P 
Answered by | 19 Feb, 2014, 02:47: PM
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