Questions
An ideal gas (1.5) is expanded adiabatically. How many times has the gas to be expanded to reduce the root mean square velocity of molecules 2.0 times?
detailed solution
Correct option is B
vrms = 3RTM or vrms ∝Tvrms, is to reduce two times, i.e., temperature of the gas will have to reduce four times orT'T = 14 During adiabatic process,TVγ-1 = T'V'γ-1or V'V = (TT')γγ-1 = (4)11.5-1 = 42 = 16∴ V' = 16 VTalk to our academic expert!
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