JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 12 April 2023, Shift 1, Chemistry Q83

Question 83 of 90 in this shift, Chemistry question 23 of 30, Section B.

One mole of an ideal gas at 350K is in a 2.0 L vessel of thermally conducting walls, which are in contact with the surroundings. It undergoes isothermal reversible expansion from 2.0L to 3.0L against a constant pressure of 4 atm. The change in entropy of the surroundings (

\Delta S

) is ___________ J K

^{-1}

(Nearest integer) Given: R = 8.314 J K

^{-1}

mol

^{-1}

Official answer

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Entropy
Idea tested: Entropy of Surroundings and Universe

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.