Kinetic Theory and Thermodynamics: Entropy MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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EntropyHardQuestion 31052

Question

Throttling (Joule-Thomson effect) for an ideal gas: temperature change is:

A
Positive always
B
Negative always
C
Zero
Correct
D
Depends on γ

Correct answer

Zero

Explanation

For an ideal gas, Joule-Thomson coefficient μ_JT = 0 — no temperature change during throttling. Real gases show cooling or warming depending on temperature relative to inversion temperature.

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