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JEE Main 2020 — Thermodynamics (C) Question with Solution

JEE Main 2020 (08 Jan Shift 2)

Question

At constant volume, 4 mol of an ideal gas when heated from 300K to 500K changes its internal energy by 5000J. The molar heat capacity at constant volume is ________

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Show full solutionCorrect answer: 6.25
Correct answer
6.25

Step-by-step explanation

For ideal gas :

ΔU=nCVT2−T1

⇒ 5000=4× C V [500−300]

⇒CV=5000800=6.25 J mole −1K−1

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About this question

This is a previous-year question from JEE Main 2020, covering the Thermodynamics (C) chapter of Chemistry. 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.