JEE Main 2026 — Thermodynamics (C) Question with Solution
JEE Main 2026 (05 April Shift 2)
Question
Consider the following data for the reaction
at . The (in kJ mol) for the reaction is :
at . The (in kJ mol) for the reaction is :
| Compound | (kJ mol) | (J mol K) |
|---|---|---|
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
The given reaction is .
The standard enthalpy of reaction, , is calculated as:
The standard entropy of reaction, , is calculated as:
Converting to :
Now, using the Gibbs free energy equation:
Answer:
The standard enthalpy of reaction, , is calculated as:
The standard entropy of reaction, , is calculated as:
Converting to :
Now, using the Gibbs free energy equation:
Answer:
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Thermodynamics (C) chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
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.