The specific heats , and
of a gas of diatomic molecules ,A, are given ( in units of
) by 29 and 22 , respectively . Another gas of diatomic molecules , B , has the corresponding value 30 and 21 . If they are treated as ideal gases , then :
A is rigid but B has a vibrational mode.
a has a vibrational mode but B has none.
A has one vibrational mode and B has two.
Both A and B have a vibrational mode each.
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For gas A ,
Option 1)
A is rigid but B has a vibrational mode.
Option 2)
a has a vibrational mode but B has none.
Option 3)
A has one vibrational mode and B has two.
Option 4)
Both A and B have a vibrational mode each.