NEET Physics Isothermal & Adiabatic Processes MCQ Question
What happens to the internal energy (∆U) of an ideal gas during an isothermal expansion into a vacuum?
∆U = 0
∆U increases
∆U decreases
∆U is undefined
Correct Answer
Detailed Explanation
During an isothermal expansion of an ideal gas into a vacuum, it has been experimentally determined that the change in internal energy (∆U) is zero, as q = 0 and w = 0.
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