If one mole of the polyatomic gas is having two vibrational modes and … is the ratio of molar specific heats for polyatomic gas … then the value of … is :

Option C. For polyatomic gas molecule has 3 rotational degrees of freedom, 3 translational degrees of freedom, and 2 vibrational modes.

Heat and Thermodynamics

JEE Main 2021 · 17 Mar, Evening shift · Q7306

PhysicsEasy251×since 2002Q7306

If one mole of the polyatomic gas is having two vibrational modes and

\beta

is the ratio of molar specific heats for polyatomic gas

\left( {\beta = {{{C_P}} \over {{C_V}}}} \right)

then the value of

\beta

is :