JEE Main 2022PhysicsThermodynamicsEasyNumerical

JEE Main 2022 — Thermodynamics Question with Solution

JEE Main 2022 (27 Jun Shift 2)

Question

A diatomic gas γ=1.4 does 400 J of work when it is expanded isobarically. The heat given to the gas in the process is _____ J.

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Show full solutionCorrect answer: 1400
Correct answer
1400

Step-by-step explanation

For isobaric process: W=nRΔT⇒400=nRΔT

Also: Q=nCpΔT 

 ⇒Q=n7R2ΔT  (Cp=7R2, for diatomic gas)

Q=72×400=1400 J

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About this question

This is a previous-year question from JEE Main 2022, covering the Thermodynamics 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.