The γ = C_p/C_v value for hydrogen, helium, and another ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode), - PHYSICS MCQ NEET 2019 2026 | ExamTest.live

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The γ = \frac{C _{p}}{C _{v}} value for hydrogen, helium, and another ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to:

Solution & Step-by-step Explanation

γ = 1 + \frac{2}{f}, where f is degrees of freedom.Hydrogen (H_{2}): Diatomic rigid, f = 5 ⟹ γ = 1 + \frac{2}{5} = \frac{7}{5} .Helium (He): Monatomic, f = 3 ⟹ γ = 1 + \frac{2}{3} = \frac{5}{3} .Gas X : Diatomic non-rigid, f = 5 (rigid) + 2 (vibrational) = 7 ⟹ γ = 1 + \frac{2}{7} = \frac{9}{7} .

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The γ = \frac{C _{p}}{C _{v}} value for hydrogen, helium, and another ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to:

\frac{7}{5}, \frac{5}{3}, \frac{9}{7}

\frac{5}{3}, \frac{7}{5}, \frac{9}{7}

\frac{5}{3}, \frac{7}{5}, \frac{7}{5}

\frac{7}{5}, \frac{7}{5}, \frac{5}{3}

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