For the reaction at 298 K, $2A + B \rightarrow C$, $\Delta H = 400$ kJ mol$^{-1}$ and $\Delta S = 0.2$ kJ mol$^{-1}$ K$^{-1}$. The reaction will become spontaneous above ________ K.

JEE Main 2024 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 6 April 2024, Shift 2, Chemistry Q83

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

For the reaction at 298 K,

2A + B \rightarrow C

\Delta H = 400

kJ mol

^{-1}

and

\Delta S = 0.2

kJ mol

^{-1}

^{-1}

. The reaction will become spontaneous above ________ K.

Official answer

2000

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Gibbs Free Energy
Idea tested: Temperature Dependence

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.