Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?
Correct answer: C. Do not exert attractive force on each other
- A. Do not lose energy on collision
- B. Are above the inversion temperature
- C. Do not exert attractive force on each other
- D. Do work equal to loss in kinetic energy
Explanation
In the free expansion of an ideal gas, there are no intermolecular attractive forces, so internal energy and temperature do not change. Real-gas cooling can occur because intermolecular forces are significant.
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