JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 25 June 2022, Shift 1, Chemistry Q84

Question 84 of 90 in this shift, Chemistry question 24 of 30, Section B.

The standard entropy change for the reaction

4\mathrm{Fe(s)} + 3\mathrm{O_2(g)} \rightarrow 2\mathrm{Fe_2O_3(s)}

-550\ \mathrm{J\ K^{-1}}

at 298 K. [Given : The standard enthalpy change for the reaction is

-165\ \mathrm{kJ\ mol^{-1}}

]. The temperature in K at which the reaction attains equilibrium is __________. (Nearest Integer)

Official answer

300

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Gibbs Free Energy
Idea tested: Gibbs Energy and Equil

Same idea in other shifts

Asked 10× in all

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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.