JEE Main 2026 — Thermodynamics (C) Question with Solution
JEE Main 2026 (06 April Shift 1)
Question
Consider the reaction at K. If and are kJ mol and at the same temperature, then the magnitude of for the reaction in J K mol is _______. (Nearest integer) (Given: J K mol, , , )
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Show full solutionCorrect answer: 34
Correct answer
34
Step-by-step explanation
The standard Gibbs free energy change is given by:
First, calculate :
Substituting the given values:
Now, calculate :
Using the relation :
The magnitude of is .
Answer:
First, calculate :
Substituting the given values:
Now, calculate :
Using the relation :
The magnitude of is .
Answer:
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This is a previous-year question from JEE Main 2026, covering the Thermodynamics (C) chapter of Chemistry. 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.