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Consider a triatomic molecule of the shape in 3-d. the heat capacity of this molecule at high temperature is
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Surya prakash verma![best-answer]()
Because this is a 3D molecules, it has following degrees of freedom. a.3 translational dof b.3 rotational dof as the temp is high so 2 vibrational degree vibrational dof is same for monoatomic,diatomic or 3D so total 8 dof. heat capacity is fK/2=8K/2=4K K is Boltzmann constant
The given answer is 6K
let me look at the question once more
my mistake, just found a post for 3D rigid boday at high temp dof is taken as 12
https://chemistry.stackexchange.com/questions/83840/does-a-diatomic-gas-have-one-or-two-vibrational-degrees-of-freedom#:~:text=For%20a%20diatomic%20molecule%2C%20N,be%20considered%20to%20be%201.