Question

Calculate the RMS velocity of molecules of a gas of which the ratio of two specific heats is 1.42 and velocity of sound in the gas is 500 m/s.
A. 727 m/s
B. 527 m/s
C. 927 m/s
D. 750 m/s

Answer 1

Correct Answer - A
`V_(S)=sqrt((gamma)/(3))C_(rms)`
`=sqrt((1.42)/(3))xxC_(rms)`
`500=sqrt(0.47)C_(rms)`
`C_(rms)=(500)/(sqrt(0.47))=727m//s`.