The root mean square velocity of the molecules of diatomic gas is u. When the temperature is doubled, the molecules dissociates into two atoms, the new RMS velocity of the atom is ___?
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a
2u
b
u
c
2u
d
4u
answer is C.
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Detailed Solution
u=3RTM; If T=2T and M=M/2. Then u1=3R×2TM/2∴u1u=4=2