Q. The correct option for free expansion of an ideal gas under adiabatic condition is :
A) q = 0, $\Delta T < 0$ and w > 0
B) q < 0, $\Delta T = 0$ and w = 0
C) q > 0, $\Delta T > 0$ and w > 0
D) q = 0, $\Delta T = 0$ and w = 0
Explanation
[Solution] Adiabatic: q = 0; free expansion against zero pressure: w = 0; hence $\Delta U = 0$ and $\Delta T = 0$ for an ideal gas. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.