JEE Main 2023PhysicsThermal Properties of MatterEasyMCQ

JEE Main 2023 — Thermal Properties of Matter Question with Solution

JEE Main 2023 (25 Jan Shift 2)

Question

According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one additional vibrational mode is :-

Choose an option

Show full solutionCorrect option: D
Correct answer
D72R

Step-by-step explanation

A diatomic gas has 5 degrees of freedom apart from vibrational degree of freedom. For each additional vibrational mode, degree of freedom is increased by 2. So new degree of freedom,

f=5+2=7

Therefore, we require molar specific heat capacity at constant volume, which is given by

Cv=f2R=72R

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About this question

This is a previous-year question from JEE Main 2023, covering the Thermal Properties of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.