JEE Main 2023 — Thermodynamics (C) Question with Solution
JEE Main 2023 (13 Apr Shift 2)
Question
What happens when methane undergoes combustion in systems A and B respectively?
Choose an option
Show full solutionCorrect option: A
| System A | System B |
| Temperature rises | Temperature remains same |
Step-by-step explanation
For an adiabatic free expansion of an ideal gas, the gas is kept in an insulated container and then permitted to enlarge in a vacuum. Since there is no external pressure for the gas to enlarge against, the work done by or on the system is zero. Since this process does not involve any exchange of heat transfer or work, heat will not escape and temperature of system will rise.
For diathermic container, heat will escape the container and hence temperature of container will remain same.
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This is a previous-year question from JEE Main 2023, 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.