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NEETPhysics-Thermodynamics

NEET Physics Specific Heat Capacities MCQ Question

Type: MCQ-conceptual-Medium-Class 11

The value of γ=CpCv\gamma = \frac{C_p}{C_v}, for hydrogen, helium and another ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to

A

75,97,37\frac{7}{5}, \frac{9}{7}, \frac{3}{7}

B

53,75,75\frac{5}{3}, \frac{7}{5}, \frac{7}{5}

C

53,75,35\frac{5}{3}, \frac{7}{5}, \frac{3}{5}

D

75,53,53\frac{7}{5}, \frac{5}{3}, \frac{5}{3}

Correct Answer

Option B

Detailed Explanation

For monoatomic gases like helium, γ=53\gamma = \frac{5}{3}. For diatomic gases like hydrogen, γ=75\gamma = \frac{7}{5}. For a diatomic gas with vibrational modes, γ\gamma decreases.

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