States of Matter - Result Question 35

####35. The average velocity of an ideal gas molecule at 27C is 0.3m/s. The average velocity at 927C will be (1986,1M)

(a) 0.6m/s

(b) 0.3m/s

(c) 0.9m/s

(d) 3.0m/s

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Solution:

  1. Expression for average velocity is uav=8RTπM

For the same gas but at different temperature

uavg(T1)uavg(T2)=T1T2=3001200=12 uav(927C)=2×uav(27C)=0.6ms1



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