Question

The ratio of principal molar heat capacities of a gas is maximum for :

• A. a diatomic gas
• B. a monoatomic gas
• C. a polyatomic gas having linear molecules
• D. a polyatomic gas having non-linear molecules

Answer 1

Answer: (B)

$\gamma =1+\frac{2}{F}$
where $F$ is number of degree of freedom.
As $F$ is least for a monoatomic gas molecules, $\gamma$ is maximum for monoatomic gas molecule.