gamma diatomic

Question

Adiabatic index γ for diatomic (rotational active) gas is:

RankGuru · Accepted Answer

For a diatomic gas with $f=5$ degrees of freedom:
1. $C_v = \frac{f}{2} R = \frac{5}{2} R$
2. $C_p = C_v + R = \frac{5}{2} R + R = \frac{7}{2} R$
3. The adiabatic index $\gamma = \frac{C_p}{C_v} = \frac{7/2 R}{5/2 R} = \frac{7}{5} = 1.4$.

Rank Guru

gamma diatomic

Select the correct option: