For a gas,gamma = 7/5. The gas may probably b | vedclass

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(B) The adiabatic index $\gamma$ is defined as the ratio of the molar heat capacity at constant pressure $(C_p)$ to the molar heat capacity at constan

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Hydrogen

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(B) The adiabatic index $\gamma$ is defined as the ratio of the molar heat capacity at constant pressure $(C_p)$ to the molar heat capacity at constant volume $(C_v)$,given by $\gamma = C_p/C_v = 1 + 2/f$,where $f$ is the degrees of freedom.For a monatomic gas,$f = 3$,so $\gamma = 1 + 2/3 = 5/3 \approx 1.67$.For a diatomic gas,$f = 5$ (at room temperature),so $\gamma = 1 + 2/5 = 7/5 = 1.4$.Since the given value is $\gamma = 7/5$,the gas must be diatomic.Among the given options,Helium $(He)$,Argon $(Ar)$,and Neon $(Ne)$ are monatomic noble gases,while Hydrogen $(H_2)$ is a diatomic gas.Therefore,the gas is Hydrogen.

For a gas,$\gamma = 7/5$. The gas may probably be

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