The speed of sound through oxygen at TK is v ms –1 . As the temperature becomes 2T and oxygen gas dissociates into atomic oxygen, the speed of sound :
A
remains the same
B
becomes 2v
C
becomes 
D
none of these
Text Solution
Verified by ExpertsThe correct answer is:
D
The rms velocity of sound in gas is
v rms(molecules) = 
...
when the oxygen dissociates, its molecular mass becomes atomic mass,
v rms(atomic) = 
= 
...
From equations and
= 
= 2.18
Hence, v rms (atomic) = 2.18 v rms(molecular)
v rms = 2.18 v rms
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