The specific heats, 
and 
of a gas of diatomic molecules, 
are given (in units of 
) by 29 and 22, respectively. Another gas of diatomic molecules 
, has the corresponding values 30 and 21. If they are treated as ideal gases, then
A
has a vibrational mode but 
has none B
Both 
and 
have a vibrational mode each
and have a vibrational mode each C
has one vibrational mode and 
has two D
is rigid but 
has a vibrational mode
Text Solution
Verified by ExpertsThe correct answer is:
A
Now, in given case,
For gas 
For gas 
By using, 
We have,
For gas 
,
So, gas 
has vibrational mode of degree of freedom.
For gas 
,
Hence, gas 
does not have any vibrational mode of degree of freedom.
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