JEE Main 2026 — Thermodynamics Question with Solution
JEE Main 2026 (02 April Shift 2)
Question
moles of unknown gas is heated at constant volume from to . The molar specific heat of this gas at constant pressure cal/mol.°C and J/mol.°C. The change in the internal energy of the gas is _______ calorie.
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Show full solutionCorrect answer: 300
Correct answer
300
Step-by-step explanation
Given moles, .
The molar specific heat at constant pressure is .
The universal gas constant is .
Converting into calories, we use :
Using Mayer's relation, the molar specific heat at constant volume is:
The change in internal energy of the gas is given by:
Answer:
The molar specific heat at constant pressure is .
The universal gas constant is .
Converting into calories, we use :
Using Mayer's relation, the molar specific heat at constant volume is:
The change in internal energy of the gas is given by:
Answer:
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This is a previous-year question from JEE Main 2026, 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.