JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 15 April 2023, Shift 1, Chemistry Q82

Question 82 of 90 in this shift, Chemistry question 22 of 30, Section B.

30.4 kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is 28.4 J

\mathrm{K^{-1}\,mol^{-1}}

at 1 atm. The melting point of sodium chloride is __________ K (Nearest Integer)

Official answer

1070

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Entropy
Idea tested: Entropy Change at Equilibrium Phase Transition

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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.