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Question

Calculate the KEper molecule and also r.m.s velocity of a gas at 127 oC.Given kb =1.38 x 10 -23 J/molecule K& mass per molecule of the gas= 6.4x 10 -27kg

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Solution

The kinetic energy per molecule is given by,
32kT=32×1.38×10-23× (273+127)=32×1.38×10-23×400=8.28×10-21JRms velocity,vr.m.s=2Em=2×8.28×10-216.4×10-27=2.58×106=1.6×103 m/s

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