Physics-Isothermal & Adiabatic Processes
NEET Physics Isothermal & Adiabatic Processes MCQ Question
Type: MCQ-numerical-Medium-Class 11
For an isothermal expansion of an ideal gas into vacuum at 25°C, if the initial volume is 2 liters and the final volume is 10 liters, what is the change in internal energy (ΔU) of the gas?
A
0 J
B
100 J
C
200 J
D
-200 J
Correct Answer
Option A
Detailed Explanation
In an isothermal expansion of an ideal gas into a vacuum, w = 0 and q = 0 as stated in the NCERT context. Therefore, ΔU = q - w = 0.
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