γ=1+f2
f=6, Triatomic rigid gas
f=7, Diatomic non-rigid gas
f=5, Diatomic rigid gas
f=3, monoatomic rigid gas
γ=1+62=34 (Triatomic)
γ=1+72=79( Diatomic, non-rigid )
γ=1+52=57( Diatomic, rigid )
γ=1+32=35( Monoatomic, rigid )
A-III, B-IV, C-I, D-II